./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0232-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a 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_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI --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 01db24b1589b54f78ea9acc56548e9023dc94ca9b67a9629bccf00110df292f7 --- 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-5e519f3 [2022-11-03 01:43:18,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:43:18,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:43:18,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:43:18,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:43:18,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:43:18,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:43:18,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:43:18,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:43:18,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:43:18,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:43:18,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:43:18,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:43:18,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:43:18,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:43:18,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:43:18,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:43:18,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:43:18,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:43:18,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:43:18,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:43:18,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:43:18,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:43:18,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:43:18,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:43:18,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:43:18,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:43:18,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:43:18,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:43:18,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:43:18,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:43:18,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:43:18,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:43:18,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:43:18,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:43:18,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:43:18,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:43:18,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:43:18,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:43:18,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:43:18,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:43:18,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 01:43:18,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:43:18,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:43:18,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:43:18,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:43:18,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:43:18,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:43:18,681 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:43:18,682 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:43:18,682 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:43:18,682 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:43:18,682 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:43:18,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:43:18,683 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:43:18,683 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:43:18,684 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:43:18,684 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:43:18,684 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:43:18,685 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:43:18,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 01:43:18,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 01:43:18,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:43:18,687 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:43:18,687 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 01:43:18,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:43:18,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:43:18,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:43:18,688 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 01:43:18,689 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 01:43:18,689 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 01:43:18,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:43:18,689 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:43:18,690 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:43:18,690 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:43:18,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:43:18,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:43:18,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:18,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:43:18,692 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:43:18,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:43:18,693 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:43:18,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:43:18,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:43:18,693 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_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01db24b1589b54f78ea9acc56548e9023dc94ca9b67a9629bccf00110df292f7 [2022-11-03 01:43:19,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:43:19,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:43:19,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:43:19,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:43:19,042 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:43:19,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/memsafety/test-0232-3.i [2022-11-03 01:43:19,126 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/data/c1b347d30/3bed341195294c51910d417b78475890/FLAG7d916c990 [2022-11-03 01:43:19,744 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:43:19,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/sv-benchmarks/c/memsafety/test-0232-3.i [2022-11-03 01:43:19,756 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/data/c1b347d30/3bed341195294c51910d417b78475890/FLAG7d916c990 [2022-11-03 01:43:20,057 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/data/c1b347d30/3bed341195294c51910d417b78475890 [2022-11-03 01:43:20,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:43:20,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:43:20,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:20,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:43:20,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:43:20,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748f0429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20, skipping insertion in model container [2022-11-03 01:43:20,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:43:20,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:43:20,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:20,598 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:43:20,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:20,701 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:43:20,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20 WrapperNode [2022-11-03 01:43:20,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:20,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:20,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:43:20,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:43:20,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,775 INFO L138 Inliner]: procedures = 126, calls = 38, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-11-03 01:43:20,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:20,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:43:20,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:43:20,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:43:20,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,802 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:43:20,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:43:20,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:43:20,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:43:20,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (1/1) ... [2022-11-03 01:43:20,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:20,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:20,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:43:20,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:43:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:43:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:43:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:43:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:43:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:43:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:43:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:43:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:43:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:43:20,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:43:20,999 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:43:21,001 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:43:21,587 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:43:21,618 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:43:21,618 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:43:21,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:21 BoogieIcfgContainer [2022-11-03 01:43:21,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:43:21,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:43:21,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:43:21,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:43:21,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:43:20" (1/3) ... [2022-11-03 01:43:21,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574abe3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:21, skipping insertion in model container [2022-11-03 01:43:21,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:20" (2/3) ... [2022-11-03 01:43:21,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574abe3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:21, skipping insertion in model container [2022-11-03 01:43:21,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:21" (3/3) ... [2022-11-03 01:43:21,630 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232-3.i [2022-11-03 01:43:21,650 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:43:21,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2022-11-03 01:43:21,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:43:21,728 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;@6eb6c66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:43:21,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-11-03 01:43:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 01:43:21,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:21,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 01:43:21,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash 175096, now seen corresponding path program 1 times [2022-11-03 01:43:21,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:21,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460004034] [2022-11-03 01:43:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:21,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:22,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:22,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460004034] [2022-11-03 01:43:22,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460004034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:22,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:22,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:43:22,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044005672] [2022-11-03 01:43:22,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:22,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:22,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:22,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:22,178 INFO L87 Difference]: Start difference. First operand has 98 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 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 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:22,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:22,403 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2022-11-03 01:43:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:43:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-03 01:43:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:22,415 INFO L225 Difference]: With dead ends: 122 [2022-11-03 01:43:22,415 INFO L226 Difference]: Without dead ends: 121 [2022-11-03 01:43:22,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:22,421 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 170 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:22,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 67 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-03 01:43:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 90. [2022-11-03 01:43:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 89 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-11-03 01:43:22,462 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 3 [2022-11-03 01:43:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:22,462 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-11-03 01:43:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-11-03 01:43:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 01:43:22,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:22,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 01:43:22,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:43:22,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:22,465 INFO L85 PathProgramCache]: Analyzing trace with hash 175097, now seen corresponding path program 1 times [2022-11-03 01:43:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:22,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875708957] [2022-11-03 01:43:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:22,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:22,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875708957] [2022-11-03 01:43:22,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875708957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:22,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:22,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:43:22,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871704036] [2022-11-03 01:43:22,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:22,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:22,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:22,621 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:22,746 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-11-03 01:43:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-03 01:43:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:22,748 INFO L225 Difference]: With dead ends: 79 [2022-11-03 01:43:22,748 INFO L226 Difference]: Without dead ends: 79 [2022-11-03 01:43:22,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:22,750 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:22,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 36 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-03 01:43:22,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-11-03 01:43:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-11-03 01:43:22,758 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 3 [2022-11-03 01:43:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:22,758 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-11-03 01:43:22,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-11-03 01:43:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:43:22,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:22,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:43:22,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:43:22,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:22,761 INFO L85 PathProgramCache]: Analyzing trace with hash 5427956, now seen corresponding path program 1 times [2022-11-03 01:43:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694681160] [2022-11-03 01:43:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:22,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:22,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694681160] [2022-11-03 01:43:22,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694681160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:22,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:22,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:43:22,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953361059] [2022-11-03 01:43:22,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:22,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:43:22,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:43:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:43:22,808 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:22,939 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-11-03 01:43:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:43:22,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 01:43:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:22,941 INFO L225 Difference]: With dead ends: 100 [2022-11-03 01:43:22,941 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 01:43:22,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:43:22,943 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:22,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 59 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 01:43:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2022-11-03 01:43:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 43 states have (on average 1.813953488372093) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-11-03 01:43:22,950 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 4 [2022-11-03 01:43:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:22,950 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-11-03 01:43:22,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-11-03 01:43:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:43:22,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:22,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:43:22,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:43:22,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:22,953 INFO L85 PathProgramCache]: Analyzing trace with hash 5427957, now seen corresponding path program 1 times [2022-11-03 01:43:22,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:22,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806718666] [2022-11-03 01:43:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:22,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:23,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806718666] [2022-11-03 01:43:23,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806718666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:23,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:23,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:43:23,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937842261] [2022-11-03 01:43:23,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:23,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:43:23,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:23,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:43:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:43:23,056 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:23,110 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-11-03 01:43:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:43:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 01:43:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:23,112 INFO L225 Difference]: With dead ends: 71 [2022-11-03 01:43:23,112 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 01:43:23,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:43:23,114 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:23,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:43:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 01:43:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-11-03 01:43:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-11-03 01:43:23,129 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 4 [2022-11-03 01:43:23,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:23,132 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-11-03 01:43:23,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:23,132 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-11-03 01:43:23,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:43:23,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:23,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:23,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:43:23,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:23,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:23,136 INFO L85 PathProgramCache]: Analyzing trace with hash 732400519, now seen corresponding path program 1 times [2022-11-03 01:43:23,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:23,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531468001] [2022-11-03 01:43:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:23,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:23,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:23,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531468001] [2022-11-03 01:43:23,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531468001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:23,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:23,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:43:23,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363143377] [2022-11-03 01:43:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:23,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:43:23,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:43:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:43:23,461 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 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) [2022-11-03 01:43:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:23,667 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-11-03 01:43:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:43:23,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:43:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:23,668 INFO L225 Difference]: With dead ends: 78 [2022-11-03 01:43:23,669 INFO L226 Difference]: Without dead ends: 78 [2022-11-03 01:43:23,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:43:23,670 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:23,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 330 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-03 01:43:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-11-03 01:43:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-03 01:43:23,676 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 8 [2022-11-03 01:43:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:23,677 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-03 01:43:23,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 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) [2022-11-03 01:43:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-03 01:43:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:43:23,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:23,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:23,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:43:23,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1961056907, now seen corresponding path program 1 times [2022-11-03 01:43:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:23,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328524042] [2022-11-03 01:43:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:23,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:23,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:23,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328524042] [2022-11-03 01:43:23,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328524042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:23,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:23,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:43:23,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943208261] [2022-11-03 01:43:23,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:23,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:43:23,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:43:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:23,857 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2022-11-03 01:43:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:24,019 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2022-11-03 01:43:24,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:24,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:43:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:24,022 INFO L225 Difference]: With dead ends: 99 [2022-11-03 01:43:24,023 INFO L226 Difference]: Without dead ends: 99 [2022-11-03 01:43:24,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:24,027 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 128 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:24,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 101 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-03 01:43:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2022-11-03 01:43:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.625) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-11-03 01:43:24,047 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 13 [2022-11-03 01:43:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:24,047 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-11-03 01:43:24,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2022-11-03 01:43:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-11-03 01:43:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:43:24,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:24,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:24,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:43:24,049 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1961056908, now seen corresponding path program 1 times [2022-11-03 01:43:24,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:24,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172751248] [2022-11-03 01:43:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:24,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:24,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172751248] [2022-11-03 01:43:24,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172751248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:24,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:24,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:43:24,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923351176] [2022-11-03 01:43:24,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:24,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:43:24,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:43:24,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:24,379 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2022-11-03 01:43:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:24,539 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2022-11-03 01:43:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:43:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:24,541 INFO L225 Difference]: With dead ends: 102 [2022-11-03 01:43:24,541 INFO L226 Difference]: Without dead ends: 102 [2022-11-03 01:43:24,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:24,542 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 143 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:24,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 100 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-03 01:43:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2022-11-03 01:43:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-11-03 01:43:24,546 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 13 [2022-11-03 01:43:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:24,547 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-11-03 01:43:24,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2022-11-03 01:43:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-11-03 01:43:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:43:24,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:24,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:24,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:43:24,549 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash -914867800, now seen corresponding path program 1 times [2022-11-03 01:43:24,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:24,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692639371] [2022-11-03 01:43:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:24,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:24,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:24,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692639371] [2022-11-03 01:43:24,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692639371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:24,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:24,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:24,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298373131] [2022-11-03 01:43:24,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:24,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:24,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:24,622 INFO L87 Difference]: Start difference. First operand 73 states and 77 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) [2022-11-03 01:43:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:24,732 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-11-03 01:43:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:24,733 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 15 [2022-11-03 01:43:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:24,734 INFO L225 Difference]: With dead ends: 72 [2022-11-03 01:43:24,734 INFO L226 Difference]: Without dead ends: 72 [2022-11-03 01:43:24,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:24,735 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 15 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:24,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 145 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-03 01:43:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-03 01:43:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 71 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) [2022-11-03 01:43:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-11-03 01:43:24,739 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 15 [2022-11-03 01:43:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:24,740 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-11-03 01:43:24,740 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) [2022-11-03 01:43:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-11-03 01:43:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:43:24,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:24,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:24,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:43:24,742 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:24,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:24,742 INFO L85 PathProgramCache]: Analyzing trace with hash -914867799, now seen corresponding path program 1 times [2022-11-03 01:43:24,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:24,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797408922] [2022-11-03 01:43:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:24,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:25,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:25,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797408922] [2022-11-03 01:43:25,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797408922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:25,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:25,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:43:25,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465475958] [2022-11-03 01:43:25,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:25,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:43:25,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:43:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:25,051 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2022-11-03 01:43:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:25,265 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-11-03 01:43:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:25,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 01:43:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:25,267 INFO L225 Difference]: With dead ends: 100 [2022-11-03 01:43:25,267 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 01:43:25,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:43:25,268 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 234 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:25,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 149 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 01:43:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2022-11-03 01:43:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.5625) internal successors, (75), 70 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) [2022-11-03 01:43:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-11-03 01:43:25,271 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 15 [2022-11-03 01:43:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:25,271 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-11-03 01:43:25,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2022-11-03 01:43:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-11-03 01:43:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:43:25,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:25,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:25,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:43:25,273 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash -883335857, now seen corresponding path program 1 times [2022-11-03 01:43:25,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:25,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492127321] [2022-11-03 01:43:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:25,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:25,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:25,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492127321] [2022-11-03 01:43:25,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492127321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:25,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:25,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:43:25,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974483834] [2022-11-03 01:43:25,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:25,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:25,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:25,390 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.0) 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) [2022-11-03 01:43:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:25,491 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-11-03 01:43:25,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:25,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) 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 15 [2022-11-03 01:43:25,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:25,493 INFO L225 Difference]: With dead ends: 71 [2022-11-03 01:43:25,493 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 01:43:25,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:43:25,494 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:25,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 108 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 01:43:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-03 01:43:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-11-03 01:43:25,497 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 15 [2022-11-03 01:43:25,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:25,498 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-11-03 01:43:25,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) 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) [2022-11-03 01:43:25,498 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-11-03 01:43:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:43:25,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:25,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:25,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 01:43:25,504 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1703869309, now seen corresponding path program 1 times [2022-11-03 01:43:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:25,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646283600] [2022-11-03 01:43:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:25,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:26,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:26,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646283600] [2022-11-03 01:43:26,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646283600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:26,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:26,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:43:26,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383473407] [2022-11-03 01:43:26,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:26,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:43:26,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:26,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:43:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:43:26,033 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2022-11-03 01:43:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:26,566 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2022-11-03 01:43:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:43:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 16 [2022-11-03 01:43:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:26,567 INFO L225 Difference]: With dead ends: 136 [2022-11-03 01:43:26,567 INFO L226 Difference]: Without dead ends: 136 [2022-11-03 01:43:26,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:43:26,568 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 321 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:26,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 191 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:43:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-03 01:43:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2022-11-03 01:43:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 80 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-11-03 01:43:26,572 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 16 [2022-11-03 01:43:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:26,572 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-11-03 01:43:26,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2022-11-03 01:43:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-11-03 01:43:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:43:26,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:26,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:26,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 01:43:26,573 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:26,574 INFO L85 PathProgramCache]: Analyzing trace with hash 123776185, now seen corresponding path program 1 times [2022-11-03 01:43:26,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:26,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367112736] [2022-11-03 01:43:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:26,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:26,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:26,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367112736] [2022-11-03 01:43:26,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367112736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:26,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720462968] [2022-11-03 01:43:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:26,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:26,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:26,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:26,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:43:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 01:43:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:27,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 01:43:27,324 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-03 01:43:27,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 01:43:27,430 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:43:27,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 24 [2022-11-03 01:43:27,502 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-03 01:43:27,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 16 [2022-11-03 01:43:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:27,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:27,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 34 [2022-11-03 01:43:27,944 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:27,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 192 [2022-11-03 01:43:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:28,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720462968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:28,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047648584] [2022-11-03 01:43:28,260 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 01:43:28,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:28,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:28,270 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:28,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:28,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 01:43:28,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:43:28,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 01:43:28,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 01:43:28,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 01:43:28,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-03 01:43:28,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 01:43:28,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 01:43:28,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 01:43:28,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 65 [2022-11-03 01:43:28,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-03 01:43:28,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 01:43:28,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 19 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 63 [2022-11-03 01:43:28,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 01:43:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,026 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:43:29,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 160 [2022-11-03 01:43:29,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 46 [2022-11-03 01:43:29,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:43:29,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 01:43:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 01:43:29,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 01:43:29,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 65 [2022-11-03 01:43:29,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 01:43:29,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:29,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 01:43:29,732 INFO L356 Elim1Store]: treesize reduction 190, result has 32.4 percent of original size [2022-11-03 01:43:29,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 344 treesize of output 407 [2022-11-03 01:43:33,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 1 [2022-11-03 01:43:33,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:33,114 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:33,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 15 [2022-11-03 01:43:33,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:33,134 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:33,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 15 [2022-11-03 01:43:33,263 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:36,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2183#(and (<= 0 |ULTIMATE.start_main_~#list~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|) |ULTIMATE.start_append_#t~mem6#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_append_#in~plist#1.base|) (= (select |#valid| |ULTIMATE.start_append_~item~0#1.base|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|) |ULTIMATE.start_append_#t~mem5#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_append_~item~0#1.offset|) (or (not (= |ULTIMATE.start_append_#t~mem5#1.base| 0)) (not (= |ULTIMATE.start_append_#t~mem5#1.offset| 0))) (not (= (select |#valid| |ULTIMATE.start_append_#t~mem6#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_append_~plist#1.base|) (<= |ULTIMATE.start_append_~item~0#1.offset| 0) (= |ULTIMATE.start_append_#t~mem5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|)) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (<= |ULTIMATE.start_append_#in~plist#1.offset| 0) (<= |#NULL.base| 0) (= |ULTIMATE.start_append_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|)) (<= 0 |ULTIMATE.start_append_~plist#1.offset|) (<= (+ |ULTIMATE.start_append_~item~0#1.offset| 4) (select |#length| |ULTIMATE.start_append_~item~0#1.base|)) (<= 0 |ULTIMATE.start_append_#in~plist#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_append_~plist#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-03 01:43:36,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:36,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:36,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-03 01:43:36,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876065529] [2022-11-03 01:43:36,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:36,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:43:36,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:43:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:43:36,070 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 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) [2022-11-03 01:43:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:36,677 INFO L93 Difference]: Finished difference Result 191 states and 202 transitions. [2022-11-03 01:43:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:43:36,677 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 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 16 [2022-11-03 01:43:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:36,678 INFO L225 Difference]: With dead ends: 191 [2022-11-03 01:43:36,678 INFO L226 Difference]: Without dead ends: 191 [2022-11-03 01:43:36,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 01:43:36,681 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 263 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:36,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 476 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 528 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2022-11-03 01:43:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-03 01:43:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 88. [2022-11-03 01:43:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 87 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-11-03 01:43:36,684 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 16 [2022-11-03 01:43:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:36,685 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-11-03 01:43:36,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 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) [2022-11-03 01:43:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-11-03 01:43:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:43:36,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:36,686 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:36,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 01:43:36,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:36,909 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash 123776186, now seen corresponding path program 1 times [2022-11-03 01:43:36,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:36,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409501494] [2022-11-03 01:43:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:36,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:37,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:37,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409501494] [2022-11-03 01:43:37,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409501494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:37,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941104327] [2022-11-03 01:43:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:37,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:37,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:37,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:37,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:43:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 01:43:37,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:37,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 01:43:37,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 01:43:37,677 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-03 01:43:37,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 01:43:37,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-11-03 01:43:37,769 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:43:37,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 01:43:37,784 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 01:43:37,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 24 [2022-11-03 01:43:37,869 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-03 01:43:37,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 16 [2022-11-03 01:43:37,877 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-03 01:43:37,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-03 01:43:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:37,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:38,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 66 treesize of output 62 [2022-11-03 01:43:38,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 102 treesize of output 94 [2022-11-03 01:43:38,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 28 [2022-11-03 01:43:42,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 64 treesize of output 60 [2022-11-03 01:43:42,474 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:42,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 60 treesize of output 100 [2022-11-03 01:43:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:42,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941104327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:42,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485329383] [2022-11-03 01:43:42,594 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 01:43:42,594 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:42,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:42,595 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:42,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 01:43:42,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 01:43:42,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 01:43:42,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 01:43:42,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 01:43:42,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-03 01:43:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 01:43:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 01:43:42,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 01:43:42,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-03 01:43:42,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 65 [2022-11-03 01:43:42,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:42,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 01:43:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 19 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 78 [2022-11-03 01:43:43,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,126 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 01:43:43,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 330 treesize of output 180 [2022-11-03 01:43:43,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,209 INFO L356 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-11-03 01:43:43,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 286 treesize of output 249 [2022-11-03 01:43:43,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 01:43:43,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:43:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 01:43:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 01:43:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 01:43:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-03 01:43:43,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 65 [2022-11-03 01:43:43,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:43,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 01:43:43,830 INFO L356 Elim1Store]: treesize reduction 190, result has 32.4 percent of original size [2022-11-03 01:43:43,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 344 treesize of output 407 [2022-11-03 01:43:45,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:45,845 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:45,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 15 [2022-11-03 01:43:45,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:45,868 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:45,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 15 [2022-11-03 01:43:45,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 1 [2022-11-03 01:43:46,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:48,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2599#(and (<= 0 |ULTIMATE.start_main_~#list~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|) |ULTIMATE.start_append_#t~mem6#1.base|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_append_#in~plist#1.base|) (or (not (<= (+ |ULTIMATE.start_append_#t~mem6#1.offset| 8) (select |#length| |ULTIMATE.start_append_#t~mem6#1.base|))) (not (<= 0 (+ |ULTIMATE.start_append_#t~mem6#1.offset| 4)))) (= (select |#valid| |ULTIMATE.start_append_~item~0#1.base|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|) |ULTIMATE.start_append_#t~mem5#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_append_~item~0#1.offset|) (or (not (= |ULTIMATE.start_append_#t~mem5#1.base| 0)) (not (= |ULTIMATE.start_append_#t~mem5#1.offset| 0))) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_append_~plist#1.base|) (<= |ULTIMATE.start_append_~item~0#1.offset| 0) (= |ULTIMATE.start_append_#t~mem5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|)) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (<= |ULTIMATE.start_append_#in~plist#1.offset| 0) (<= |#NULL.base| 0) (= |ULTIMATE.start_append_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_append_~item~0#1.base|) |ULTIMATE.start_append_~item~0#1.offset|)) (<= 0 |ULTIMATE.start_append_~plist#1.offset|) (<= (+ |ULTIMATE.start_append_~item~0#1.offset| 4) (select |#length| |ULTIMATE.start_append_~item~0#1.base|)) (<= 0 |ULTIMATE.start_append_#in~plist#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_append_~plist#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-03 01:43:48,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:48,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:48,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-03 01:43:48,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046303032] [2022-11-03 01:43:48,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:48,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 01:43:48,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:48,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 01:43:48,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:43:48,999 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:49,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:49,737 INFO L93 Difference]: Finished difference Result 191 states and 202 transitions. [2022-11-03 01:43:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:43:49,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 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 16 [2022-11-03 01:43:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:49,739 INFO L225 Difference]: With dead ends: 191 [2022-11-03 01:43:49,739 INFO L226 Difference]: Without dead ends: 191 [2022-11-03 01:43:49,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 01:43:49,740 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 344 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:49,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 551 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 338 Invalid, 0 Unknown, 191 Unchecked, 0.3s Time] [2022-11-03 01:43:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-03 01:43:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 88. [2022-11-03 01:43:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 87 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) [2022-11-03 01:43:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-11-03 01:43:49,744 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 16 [2022-11-03 01:43:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:49,744 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-11-03 01:43:49,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-11-03 01:43:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:43:49,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:49,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:49,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:49,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:43:49,961 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1280341128, now seen corresponding path program 1 times [2022-11-03 01:43:49,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:49,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851258346] [2022-11-03 01:43:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:49,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:50,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:50,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851258346] [2022-11-03 01:43:50,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851258346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:50,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:50,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:43:50,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19848515] [2022-11-03 01:43:50,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:50,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:43:50,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:43:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:43:50,464 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2022-11-03 01:43:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:51,095 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2022-11-03 01:43:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:43:51,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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 17 [2022-11-03 01:43:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:51,096 INFO L225 Difference]: With dead ends: 133 [2022-11-03 01:43:51,097 INFO L226 Difference]: Without dead ends: 133 [2022-11-03 01:43:51,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:43:51,097 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 226 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:51,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 129 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:43:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-03 01:43:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 89. [2022-11-03 01:43:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 88 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-11-03 01:43:51,100 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 17 [2022-11-03 01:43:51,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:51,100 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-11-03 01:43:51,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2022-11-03 01:43:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-11-03 01:43:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:43:51,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:51,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:51,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 01:43:51,101 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1035869407, now seen corresponding path program 1 times [2022-11-03 01:43:51,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:51,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910478030] [2022-11-03 01:43:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:51,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:51,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910478030] [2022-11-03 01:43:51,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910478030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:51,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:51,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:43:51,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537548794] [2022-11-03 01:43:51,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:51,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:43:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:43:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:43:51,571 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 11 states, 10 states have (on average 1.8) 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) [2022-11-03 01:43:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:52,106 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-11-03 01:43:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:43:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) 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 18 [2022-11-03 01:43:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:52,107 INFO L225 Difference]: With dead ends: 93 [2022-11-03 01:43:52,107 INFO L226 Difference]: Without dead ends: 93 [2022-11-03 01:43:52,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:43:52,108 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 176 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:52,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 166 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:43:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-03 01:43:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-11-03 01:43:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 89 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-11-03 01:43:52,111 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 18 [2022-11-03 01:43:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:52,112 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-11-03 01:43:52,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) 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) [2022-11-03 01:43:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-11-03 01:43:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 01:43:52,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:52,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:52,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 01:43:52,113 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:52,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2047180651, now seen corresponding path program 1 times [2022-11-03 01:43:52,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:52,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79783372] [2022-11-03 01:43:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:52,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:52,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:52,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79783372] [2022-11-03 01:43:52,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79783372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:52,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:52,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:43:52,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024028551] [2022-11-03 01:43:52,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:52,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:43:52,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:52,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:43:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:52,260 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:52,391 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-11-03 01:43:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:52,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2022-11-03 01:43:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:52,392 INFO L225 Difference]: With dead ends: 89 [2022-11-03 01:43:52,392 INFO L226 Difference]: Without dead ends: 89 [2022-11-03 01:43:52,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:43:52,393 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 219 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:52,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 40 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-03 01:43:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-03 01:43:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 88 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-11-03 01:43:52,396 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 19 [2022-11-03 01:43:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:52,397 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-11-03 01:43:52,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-11-03 01:43:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:43:52,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:52,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:52,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 01:43:52,399 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:52,399 INFO L85 PathProgramCache]: Analyzing trace with hash -961909213, now seen corresponding path program 1 times [2022-11-03 01:43:52,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:52,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387822680] [2022-11-03 01:43:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:52,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:52,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:52,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387822680] [2022-11-03 01:43:52,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387822680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:52,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:52,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:52,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619020403] [2022-11-03 01:43:52,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:52,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:52,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:52,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:52,531 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:52,626 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2022-11-03 01:43:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:52,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 01:43:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:52,627 INFO L225 Difference]: With dead ends: 88 [2022-11-03 01:43:52,628 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 01:43:52,628 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 [2022-11-03 01:43:52,628 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:52,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 100 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 01:43:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-03 01:43:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 87 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) [2022-11-03 01:43:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-11-03 01:43:52,631 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 20 [2022-11-03 01:43:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:52,631 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-11-03 01:43:52,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-11-03 01:43:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 01:43:52,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:52,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:52,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 01:43:52,633 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:52,633 INFO L85 PathProgramCache]: Analyzing trace with hash 245585579, now seen corresponding path program 1 times [2022-11-03 01:43:52,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:52,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000433048] [2022-11-03 01:43:52,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:52,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:52,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000433048] [2022-11-03 01:43:52,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000433048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:52,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:52,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:52,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288937905] [2022-11-03 01:43:52,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:52,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:52,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:52,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:52,768 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:52,898 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-11-03 01:43:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:52,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2022-11-03 01:43:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:52,899 INFO L225 Difference]: With dead ends: 87 [2022-11-03 01:43:52,899 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 01:43:52,899 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 [2022-11-03 01:43:52,900 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:52,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 78 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 01:43:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-03 01:43:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.373134328358209) internal successors, (92), 86 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) [2022-11-03 01:43:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2022-11-03 01:43:52,902 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 21 [2022-11-03 01:43:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:52,903 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2022-11-03 01:43:52,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2022-11-03 01:43:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 01:43:52,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:52,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:52,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 01:43:52,904 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash -976781531, now seen corresponding path program 1 times [2022-11-03 01:43:52,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:52,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249090049] [2022-11-03 01:43:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:52,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:53,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:53,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249090049] [2022-11-03 01:43:53,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249090049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:53,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:53,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 01:43:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130876442] [2022-11-03 01:43:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:53,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:43:53,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:43:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:43:53,547 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-11-03 01:43:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:54,439 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-11-03 01:43:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:43:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 22 [2022-11-03 01:43:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:54,441 INFO L225 Difference]: With dead ends: 96 [2022-11-03 01:43:54,441 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 01:43:54,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:43:54,442 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 193 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:54,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 174 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:43:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 01:43:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-11-03 01:43:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.352112676056338) internal successors, (96), 90 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) [2022-11-03 01:43:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-11-03 01:43:54,445 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 22 [2022-11-03 01:43:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:54,445 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-11-03 01:43:54,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-11-03 01:43:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-11-03 01:43:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 01:43:54,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:54,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:54,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 01:43:54,447 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash -215456274, now seen corresponding path program 1 times [2022-11-03 01:43:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:54,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677850867] [2022-11-03 01:43:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:54,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:54,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677850867] [2022-11-03 01:43:54,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677850867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:54,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:54,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:43:54,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313813611] [2022-11-03 01:43:54,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:54,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:43:54,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:43:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:43:54,639 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2022-11-03 01:43:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:54,858 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-11-03 01:43:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:43:54,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 01:43:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:54,860 INFO L225 Difference]: With dead ends: 90 [2022-11-03 01:43:54,860 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 01:43:54,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:43:54,861 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:54,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 49 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 01:43:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-03 01:43:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 89 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-11-03 01:43:54,863 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 23 [2022-11-03 01:43:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:54,864 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-11-03 01:43:54,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2022-11-03 01:43:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-11-03 01:43:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 01:43:54,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:54,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:54,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 01:43:54,865 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-03 01:43:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash 696267619, now seen corresponding path program 1 times [2022-11-03 01:43:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:54,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946386476] [2022-11-03 01:43:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:54,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:56,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946386476] [2022-11-03 01:43:56,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946386476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719793178] [2022-11-03 01:43:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:56,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:56,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:56,395 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:56,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b5e0027-2bf2-4000-8ebc-4023756b53e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:43:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:56,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-03 01:43:56,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:56,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:56,608 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 01:43:56,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:56,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 01:43:56,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:43:56,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 22 [2022-11-03 01:43:56,932 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-03 01:43:56,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-11-03 01:43:57,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-03 01:43:57,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2022-11-03 01:43:57,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-11-03 01:43:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,561 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:43:57,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 52 [2022-11-03 01:43:57,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:43:57,705 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:43:57,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 61 [2022-11-03 01:43:57,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 60 treesize of output 36 [2022-11-03 01:43:58,011 INFO L356 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2022-11-03 01:43:58,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2022-11-03 01:43:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:58,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:58,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 80 treesize of output 76 [2022-11-03 01:44:11,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 855 treesize of output 839 [2022-11-03 01:44:44,703 WARN L234 SmtUtils]: Spent 31.01s on a formula simplification. DAG size of input: 89 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:44:47,284 INFO L356 Elim1Store]: treesize reduction 174, result has 75.7 percent of original size [2022-11-03 01:44:47,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 1092816 treesize of output 968828 [2022-11-03 01:46:19,274 WARN L234 SmtUtils]: Spent 1.53m on a formula simplification. DAG size of input: 2275 DAG size of output: 2166 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:46:22,902 INFO L356 Elim1Store]: treesize reduction 8, result has 90.1 percent of original size [2022-11-03 01:46:22,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 576363 treesize of output 576425 [2022-11-03 01:46:46,265 WARN L234 SmtUtils]: Spent 14.06s on a formula simplification. DAG size of input: 1996 DAG size of output: 1996 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:46:57,190 WARN L234 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 1995 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:48:48,882 WARN L234 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 1991 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:50:44,286 WARN L234 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 1987 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)