./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-reverse_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-reverse_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a7651578256dc791e0a036690d99e12094845a58f582fb99f9abee48c7c5dfba --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:30:09,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:30:09,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:30:09,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:30:09,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:30:09,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:30:09,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:30:09,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:30:09,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:30:09,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:30:09,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:30:09,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:30:09,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:30:09,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:30:09,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:30:09,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:30:09,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:30:09,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:30:09,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:30:09,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:30:09,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:30:09,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:30:09,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:30:09,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:30:09,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:30:09,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:30:09,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:30:09,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:30:09,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:30:09,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:30:09,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:30:09,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:30:09,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:30:09,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:30:09,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:30:09,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:30:09,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:30:09,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:30:09,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:30:09,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:30:09,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:30:09,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 16:30:09,642 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:30:09,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:30:09,643 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:30:09,643 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:30:09,643 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:30:09,644 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:30:09,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:30:09,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:30:09,645 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:30:09,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:30:09,645 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:30:09,645 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:30:09,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:30:09,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:30:09,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:30:09,646 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:30:09,646 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:30:09,646 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:30:09,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:30:09,647 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:30:09,647 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:30:09,647 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:30:09,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:30:09,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:30:09,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:30:09,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:30:09,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:30:09,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:30:09,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:30:09,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:30:09,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:30:09,649 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:30:09,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:30:09,650 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:30:09,650 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7651578256dc791e0a036690d99e12094845a58f582fb99f9abee48c7c5dfba [2022-12-13 16:30:09,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:30:09,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:30:09,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:30:09,830 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:30:09,830 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:30:09,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2022-12-13 16:30:12,341 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:30:12,540 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:30:12,540 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2022-12-13 16:30:12,551 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/data/7410c630e/53a34a5664d6461e8996a8d32b489d8d/FLAGa82ba97e1 [2022-12-13 16:30:12,564 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/data/7410c630e/53a34a5664d6461e8996a8d32b489d8d [2022-12-13 16:30:12,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:30:12,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:30:12,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:30:12,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:30:12,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:30:12,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5317b7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12, skipping insertion in model container [2022-12-13 16:30:12,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:30:12,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:30:12,785 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22251,22264] [2022-12-13 16:30:12,789 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22336,22349] [2022-12-13 16:30:12,793 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22829,22842] [2022-12-13 16:30:12,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:30:12,804 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:30:12,826 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22251,22264] [2022-12-13 16:30:12,827 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22336,22349] [2022-12-13 16:30:12,830 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22829,22842] [2022-12-13 16:30:12,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:30:12,848 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:30:12,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12 WrapperNode [2022-12-13 16:30:12,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:30:12,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:30:12,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:30:12,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:30:12,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,879 INFO L138 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 139 [2022-12-13 16:30:12,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:30:12,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:30:12,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:30:12,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:30:12,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,900 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:30:12,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:30:12,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:30:12,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:30:12,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (1/1) ... [2022-12-13 16:30:12,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:30:12,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:30:12,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:30:12,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:30:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:30:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:30:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:30:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:30:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 16:30:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 16:30:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:30:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:30:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:30:12,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:30:13,042 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:30:13,044 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:30:13,377 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:30:13,391 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:30:13,391 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-13 16:30:13,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:30:13 BoogieIcfgContainer [2022-12-13 16:30:13,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:30:13,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:30:13,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:30:13,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:30:13,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:30:12" (1/3) ... [2022-12-13 16:30:13,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fccd1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:30:13, skipping insertion in model container [2022-12-13 16:30:13,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:30:12" (2/3) ... [2022-12-13 16:30:13,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fccd1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:30:13, skipping insertion in model container [2022-12-13 16:30:13,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:30:13" (3/3) ... [2022-12-13 16:30:13,400 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple.i [2022-12-13 16:30:13,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:30:13,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-12-13 16:30:13,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:30:13,466 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=PETRI_NET, 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;@4ac8545f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:30:13,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-12-13 16:30:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 128 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-13 16:30:13,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:13,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-13 16:30:13,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-12-13 16:30:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:13,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690691518] [2022-12-13 16:30:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:13,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:13,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690691518] [2022-12-13 16:30:13,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690691518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:13,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:13,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:30:13,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205974569] [2022-12-13 16:30:13,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:13,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:30:13,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:13,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:30:13,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:30:13,678 INFO L87 Difference]: Start difference. First operand has 129 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 128 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 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) [2022-12-13 16:30:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:13,787 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2022-12-13 16:30:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:30:13,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) 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 [2022-12-13 16:30:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:13,798 INFO L225 Difference]: With dead ends: 127 [2022-12-13 16:30:13,798 INFO L226 Difference]: Without dead ends: 125 [2022-12-13 16:30:13,800 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 [2022-12-13 16:30:13,803 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 81 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:13,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 121 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:13,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-13 16:30:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-12-13 16:30:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 70 states have (on average 1.9) internal successors, (133), 124 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2022-12-13 16:30:13,835 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 3 [2022-12-13 16:30:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:13,835 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2022-12-13 16:30:13,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) 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) [2022-12-13 16:30:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2022-12-13 16:30:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-13 16:30:13,835 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:13,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-13 16:30:13,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:30:13,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:13,837 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-12-13 16:30:13,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:13,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150842870] [2022-12-13 16:30:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:13,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:13,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150842870] [2022-12-13 16:30:13,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150842870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:13,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:13,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:30:13,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403976709] [2022-12-13 16:30:13,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:13,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:30:13,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:30:13,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:30:13,901 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 3 states, 2 states have (on average 1.5) 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) [2022-12-13 16:30:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:13,987 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2022-12-13 16:30:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:30:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) 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 [2022-12-13 16:30:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:13,988 INFO L225 Difference]: With dead ends: 123 [2022-12-13 16:30:13,989 INFO L226 Difference]: Without dead ends: 123 [2022-12-13 16:30:13,989 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 [2022-12-13 16:30:13,990 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 79 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:13,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 117 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-12-13 16:30:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-12-13 16:30:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 70 states have (on average 1.8714285714285714) internal successors, (131), 122 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2022-12-13 16:30:13,995 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 3 [2022-12-13 16:30:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:13,996 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2022-12-13 16:30:13,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) 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) [2022-12-13 16:30:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2022-12-13 16:30:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 16:30:13,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:13,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:13,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:30:13,997 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash 59263661, now seen corresponding path program 1 times [2022-12-13 16:30:13,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:13,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474050169] [2022-12-13 16:30:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:13,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:14,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474050169] [2022-12-13 16:30:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474050169] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:14,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:14,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:30:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617352252] [2022-12-13 16:30:14,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:14,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:30:14,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:30:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:30:14,145 INFO L87 Difference]: Start difference. First operand 123 states and 131 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:14,279 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-12-13 16:30:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:30:14,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2022-12-13 16:30:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:14,281 INFO L225 Difference]: With dead ends: 117 [2022-12-13 16:30:14,281 INFO L226 Difference]: Without dead ends: 117 [2022-12-13 16:30:14,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:30:14,282 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 143 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:14,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 86 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-12-13 16:30:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2022-12-13 16:30:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.6891891891891893) internal successors, (125), 112 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2022-12-13 16:30:14,289 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 8 [2022-12-13 16:30:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:14,289 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2022-12-13 16:30:14,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2022-12-13 16:30:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 16:30:14,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:14,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:14,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:30:14,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash 59263662, now seen corresponding path program 1 times [2022-12-13 16:30:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:14,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647044774] [2022-12-13 16:30:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:14,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647044774] [2022-12-13 16:30:14,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647044774] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:14,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:14,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:30:14,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153992939] [2022-12-13 16:30:14,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:30:14,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:30:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:30:14,436 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:14,565 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2022-12-13 16:30:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:30:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2022-12-13 16:30:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:14,567 INFO L225 Difference]: With dead ends: 150 [2022-12-13 16:30:14,567 INFO L226 Difference]: Without dead ends: 150 [2022-12-13 16:30:14,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:30:14,568 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 143 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:14,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 129 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-13 16:30:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2022-12-13 16:30:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 96 states have (on average 1.5729166666666667) internal successors, (151), 134 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2022-12-13 16:30:14,576 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 8 [2022-12-13 16:30:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:14,576 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2022-12-13 16:30:14,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2022-12-13 16:30:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 16:30:14,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:14,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:14,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:30:14,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash 467003055, now seen corresponding path program 1 times [2022-12-13 16:30:14,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:14,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660331307] [2022-12-13 16:30:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:14,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:14,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660331307] [2022-12-13 16:30:14,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660331307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:14,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:14,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:30:14,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188050526] [2022-12-13 16:30:14,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:14,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:30:14,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:14,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:30:14,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:30:14,687 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:14,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:14,861 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2022-12-13 16:30:14,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:30:14,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 16:30:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:14,862 INFO L225 Difference]: With dead ends: 136 [2022-12-13 16:30:14,862 INFO L226 Difference]: Without dead ends: 136 [2022-12-13 16:30:14,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:30:14,863 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 71 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:14,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 230 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:14,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-13 16:30:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2022-12-13 16:30:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 96 states have (on average 1.5625) internal successors, (150), 133 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2022-12-13 16:30:14,870 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 12 [2022-12-13 16:30:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:14,870 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2022-12-13 16:30:14,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2022-12-13 16:30:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 16:30:14,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:14,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:14,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:30:14,871 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:14,872 INFO L85 PathProgramCache]: Analyzing trace with hash 467003056, now seen corresponding path program 1 times [2022-12-13 16:30:14,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:14,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322224238] [2022-12-13 16:30:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:14,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:15,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322224238] [2022-12-13 16:30:15,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322224238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:15,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:15,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:30:15,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290155982] [2022-12-13 16:30:15,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:15,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:30:15,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:30:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:30:15,016 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:15,209 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2022-12-13 16:30:15,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:30:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 16:30:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:15,210 INFO L225 Difference]: With dead ends: 132 [2022-12-13 16:30:15,210 INFO L226 Difference]: Without dead ends: 132 [2022-12-13 16:30:15,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:30:15,211 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 9 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:15,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-13 16:30:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-12-13 16:30:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 91 states have (on average 1.5384615384615385) internal successors, (140), 124 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2022-12-13 16:30:15,217 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 12 [2022-12-13 16:30:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:15,217 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2022-12-13 16:30:15,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2022-12-13 16:30:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 16:30:15,218 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:15,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:15,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:30:15,218 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:15,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1394377289, now seen corresponding path program 1 times [2022-12-13 16:30:15,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:15,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161312142] [2022-12-13 16:30:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:15,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:15,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161312142] [2022-12-13 16:30:15,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161312142] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:15,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:15,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:30:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873343249] [2022-12-13 16:30:15,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:15,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:30:15,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:30:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:30:15,257 INFO L87 Difference]: Start difference. First operand 125 states and 140 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:15,339 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2022-12-13 16:30:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:30:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 16:30:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:15,340 INFO L225 Difference]: With dead ends: 140 [2022-12-13 16:30:15,340 INFO L226 Difference]: Without dead ends: 140 [2022-12-13 16:30:15,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:30:15,341 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 126 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:15,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 174 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-13 16:30:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2022-12-13 16:30:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 124 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2022-12-13 16:30:15,347 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 14 [2022-12-13 16:30:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:15,347 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2022-12-13 16:30:15,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2022-12-13 16:30:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 16:30:15,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:15,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:15,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:30:15,348 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:15,349 INFO L85 PathProgramCache]: Analyzing trace with hash -991514342, now seen corresponding path program 1 times [2022-12-13 16:30:15,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:15,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797943908] [2022-12-13 16:30:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:15,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:15,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:15,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797943908] [2022-12-13 16:30:15,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797943908] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:15,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:15,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:30:15,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107043313] [2022-12-13 16:30:15,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:15,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:30:15,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:15,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:30:15,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:30:15,481 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:15,634 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2022-12-13 16:30:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:30:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 16:30:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:15,636 INFO L225 Difference]: With dead ends: 146 [2022-12-13 16:30:15,636 INFO L226 Difference]: Without dead ends: 146 [2022-12-13 16:30:15,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:30:15,636 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 30 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:15,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 399 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-13 16:30:15,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2022-12-13 16:30:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 99 states have (on average 1.4747474747474747) internal successors, (146), 132 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2022-12-13 16:30:15,640 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 17 [2022-12-13 16:30:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:15,640 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2022-12-13 16:30:15,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2022-12-13 16:30:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 16:30:15,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:15,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:15,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:30:15,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1632793422, now seen corresponding path program 1 times [2022-12-13 16:30:15,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:15,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189789854] [2022-12-13 16:30:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:15,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:15,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:15,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189789854] [2022-12-13 16:30:15,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189789854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:15,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:15,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:30:15,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175573888] [2022-12-13 16:30:15,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:15,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:30:15,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:15,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:30:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:30:15,737 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2022-12-13 16:30:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:15,897 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-12-13 16:30:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:30:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 [2022-12-13 16:30:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:15,899 INFO L225 Difference]: With dead ends: 152 [2022-12-13 16:30:15,899 INFO L226 Difference]: Without dead ends: 152 [2022-12-13 16:30:15,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:30:15,900 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 25 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:15,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 287 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-13 16:30:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2022-12-13 16:30:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 109 states have (on average 1.4587155963302751) internal successors, (159), 142 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2022-12-13 16:30:15,903 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 19 [2022-12-13 16:30:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:15,903 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2022-12-13 16:30:15,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2022-12-13 16:30:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2022-12-13 16:30:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 16:30:15,904 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:15,904 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] [2022-12-13 16:30:15,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:30:15,904 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1777521809, now seen corresponding path program 1 times [2022-12-13 16:30:15,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:15,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675971519] [2022-12-13 16:30:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:15,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:15,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:15,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675971519] [2022-12-13 16:30:15,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675971519] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:15,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:15,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:30:15,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736589881] [2022-12-13 16:30:15,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:15,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:30:15,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:30:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:30:15,979 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:16,146 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2022-12-13 16:30:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:30:16,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 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 [2022-12-13 16:30:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:16,147 INFO L225 Difference]: With dead ends: 144 [2022-12-13 16:30:16,147 INFO L226 Difference]: Without dead ends: 144 [2022-12-13 16:30:16,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:30:16,148 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 68 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:16,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 227 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-13 16:30:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2022-12-13 16:30:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 109 states have (on average 1.4495412844036697) internal successors, (158), 141 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2022-12-13 16:30:16,151 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 22 [2022-12-13 16:30:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:16,151 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2022-12-13 16:30:16,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2022-12-13 16:30:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 16:30:16,152 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:16,152 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] [2022-12-13 16:30:16,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 16:30:16,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:16,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1777521810, now seen corresponding path program 1 times [2022-12-13 16:30:16,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:16,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982371543] [2022-12-13 16:30:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:16,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:16,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:16,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982371543] [2022-12-13 16:30:16,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982371543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:30:16,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:30:16,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:30:16,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796794314] [2022-12-13 16:30:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:30:16,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:30:16,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:30:16,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:30:16,274 INFO L87 Difference]: Start difference. First operand 142 states and 158 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:16,435 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2022-12-13 16:30:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:30:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 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 [2022-12-13 16:30:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:16,436 INFO L225 Difference]: With dead ends: 141 [2022-12-13 16:30:16,436 INFO L226 Difference]: Without dead ends: 141 [2022-12-13 16:30:16,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:30:16,437 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 6 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:16,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 296 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:30:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-13 16:30:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-12-13 16:30:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 109 states have (on average 1.4311926605504588) internal successors, (156), 139 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2022-12-13 16:30:16,441 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 22 [2022-12-13 16:30:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:16,442 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2022-12-13 16:30:16,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2022-12-13 16:30:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 16:30:16,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:16,443 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:16,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:30:16,443 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:16,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1310880280, now seen corresponding path program 1 times [2022-12-13 16:30:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:16,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891939596] [2022-12-13 16:30:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:16,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:16,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:16,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891939596] [2022-12-13 16:30:16,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891939596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:30:16,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800038485] [2022-12-13 16:30:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:16,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:16,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:30:16,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:30:16,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:30:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:16,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 16:30:16,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:30:16,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:30:16,882 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 16:30:16,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 16:30:16,924 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:30:17,044 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:17,044 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 29 [2022-12-13 16:30:17,070 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:17,071 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 16:30:17,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:17,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-13 16:30:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:17,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:30:20,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:20,931 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 16:30:20,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:20,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-12-13 16:30:20,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-13 16:30:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:25,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800038485] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:30:25,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:30:25,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-12-13 16:30:25,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120330976] [2022-12-13 16:30:25,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:30:25,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 16:30:25,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 16:30:25,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=789, Unknown=4, NotChecked=0, Total=930 [2022-12-13 16:30:25,415 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:26,709 INFO L93 Difference]: Finished difference Result 258 states and 287 transitions. [2022-12-13 16:30:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 16:30:26,709 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 16:30:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:26,711 INFO L225 Difference]: With dead ends: 258 [2022-12-13 16:30:26,711 INFO L226 Difference]: Without dead ends: 258 [2022-12-13 16:30:26,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=277, Invalid=1201, Unknown=4, NotChecked=0, Total=1482 [2022-12-13 16:30:26,712 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 688 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:26,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 705 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 16:30:26,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-13 16:30:26,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 158. [2022-12-13 16:30:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 127 states have (on average 1.4015748031496063) internal successors, (178), 157 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2022-12-13 16:30:26,718 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 25 [2022-12-13 16:30:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:26,719 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2022-12-13 16:30:26,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2022-12-13 16:30:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 16:30:26,720 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:26,720 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:26,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:30:26,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:26,921 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1310880279, now seen corresponding path program 1 times [2022-12-13 16:30:26,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:26,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701734553] [2022-12-13 16:30:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:26,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:27,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701734553] [2022-12-13 16:30:27,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701734553] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:30:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068702767] [2022-12-13 16:30:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:27,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:30:27,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:30:27,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:30:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:27,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 16:30:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:30:27,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:30:27,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:30:27,468 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:30:27,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:30:27,507 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:30:27,515 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:30:27,660 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:30:27,660 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-13 16:30:27,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:30:27,679 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:27,680 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 29 [2022-12-13 16:30:27,726 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:27,727 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-13 16:30:27,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 16:30:27,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:27,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 16:30:27,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:27,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:27,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-12-13 16:30:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:27,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:30:28,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:28,690 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 16:30:28,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:28,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-13 16:30:28,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-12-13 16:30:28,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:28,749 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-12-13 16:30:28,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:28,756 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 16:30:28,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:28,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-13 16:30:28,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:28,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:28,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:28,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-12-13 16:30:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:29,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068702767] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:30:29,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:30:29,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2022-12-13 16:30:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029589598] [2022-12-13 16:30:29,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:30:29,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 16:30:29,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 16:30:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1007, Unknown=7, NotChecked=0, Total=1122 [2022-12-13 16:30:29,033 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:30,779 INFO L93 Difference]: Finished difference Result 260 states and 289 transitions. [2022-12-13 16:30:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 16:30:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 16:30:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:30,780 INFO L225 Difference]: With dead ends: 260 [2022-12-13 16:30:30,780 INFO L226 Difference]: Without dead ends: 260 [2022-12-13 16:30:30,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=414, Invalid=2231, Unknown=7, NotChecked=0, Total=2652 [2022-12-13 16:30:30,781 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 846 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:30,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1124 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 16:30:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-13 16:30:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 158. [2022-12-13 16:30:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 132 states have (on average 1.3863636363636365) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2022-12-13 16:30:30,786 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 25 [2022-12-13 16:30:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:30,786 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2022-12-13 16:30:30,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2022-12-13 16:30:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 16:30:30,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:30,787 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:30,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:30:30,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:30:30,989 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash 14127102, now seen corresponding path program 1 times [2022-12-13 16:30:30,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:30,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832746032] [2022-12-13 16:30:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:30,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:31,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:31,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832746032] [2022-12-13 16:30:31,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832746032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:30:31,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228359489] [2022-12-13 16:30:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:31,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:31,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:30:31,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:30:31,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:30:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 16:30:31,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:30:31,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:30:31,409 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 16:30:31,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 16:30:31,438 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:30:31,535 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:31,535 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 29 [2022-12-13 16:30:31,553 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:31,553 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 16:30:31,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:31,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-12-13 16:30:31,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:31,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-13 16:30:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:31,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:30:36,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:36,126 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 16:30:36,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:36,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-12-13 16:30:36,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-13 16:30:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:40,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228359489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:30:40,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:30:40,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-12-13 16:30:40,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167657249] [2022-12-13 16:30:40,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:30:40,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 16:30:40,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 16:30:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=687, Unknown=5, NotChecked=0, Total=812 [2022-12-13 16:30:40,517 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:43,415 INFO L93 Difference]: Finished difference Result 225 states and 256 transitions. [2022-12-13 16:30:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 16:30:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 16:30:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:43,416 INFO L225 Difference]: With dead ends: 225 [2022-12-13 16:30:43,416 INFO L226 Difference]: Without dead ends: 225 [2022-12-13 16:30:43,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=224, Invalid=1031, Unknown=5, NotChecked=0, Total=1260 [2022-12-13 16:30:43,417 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 467 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:43,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 774 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 16:30:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-12-13 16:30:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 165. [2022-12-13 16:30:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 139 states have (on average 1.381294964028777) internal successors, (192), 164 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2022-12-13 16:30:43,420 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 27 [2022-12-13 16:30:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:43,421 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2022-12-13 16:30:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:43,421 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2022-12-13 16:30:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 16:30:43,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:43,421 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:43,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 16:30:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:30:43,623 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash 14127103, now seen corresponding path program 1 times [2022-12-13 16:30:43,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:43,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349580373] [2022-12-13 16:30:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:43,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:44,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:44,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349580373] [2022-12-13 16:30:44,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349580373] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:30:44,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265075067] [2022-12-13 16:30:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:44,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:30:44,003 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:30:44,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:30:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 16:30:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:30:44,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:30:44,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:30:44,160 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:30:44,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:30:44,191 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:30:44,200 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:30:44,313 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:30:44,313 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-13 16:30:44,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:30:44,329 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:44,329 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 29 [2022-12-13 16:30:44,368 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:44,368 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-13 16:30:44,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 16:30:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:44,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-12-13 16:30:44,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:44,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 16:30:44,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:44,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 16:30:44,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:44,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:44,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-12-13 16:30:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:44,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:30:45,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:45,190 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-12-13 16:30:45,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:45,198 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 16:30:45,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:45,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2022-12-13 16:30:45,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:45,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2022-12-13 16:30:45,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-12-13 16:30:45,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-13 16:30:45,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:45,302 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 16:30:45,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:45,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:45,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:45,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-12-13 16:30:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:45,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265075067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:30:45,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:30:45,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2022-12-13 16:30:45,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061433657] [2022-12-13 16:30:45,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:30:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 16:30:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 16:30:45,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=827, Unknown=4, NotChecked=0, Total=930 [2022-12-13 16:30:45,546 INFO L87 Difference]: Start difference. First operand 165 states and 192 transitions. Second operand has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 31 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) [2022-12-13 16:30:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:46,837 INFO L93 Difference]: Finished difference Result 229 states and 260 transitions. [2022-12-13 16:30:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:30:46,838 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 31 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) Word has length 27 [2022-12-13 16:30:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:46,839 INFO L225 Difference]: With dead ends: 229 [2022-12-13 16:30:46,839 INFO L226 Difference]: Without dead ends: 229 [2022-12-13 16:30:46,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=1383, Unknown=4, NotChecked=0, Total=1640 [2022-12-13 16:30:46,841 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 588 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:46,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 885 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 16:30:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-13 16:30:46,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 165. [2022-12-13 16:30:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 139 states have (on average 1.3741007194244603) internal successors, (191), 164 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2022-12-13 16:30:46,846 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 27 [2022-12-13 16:30:46,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:46,846 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2022-12-13 16:30:46,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 31 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) [2022-12-13 16:30:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2022-12-13 16:30:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 16:30:46,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:46,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:46,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:30:47,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:47,049 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash 408081261, now seen corresponding path program 1 times [2022-12-13 16:30:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:47,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620238278] [2022-12-13 16:30:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:47,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:47,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:47,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620238278] [2022-12-13 16:30:47,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620238278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:30:47,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244956137] [2022-12-13 16:30:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:47,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:47,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:30:47,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:30:47,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:30:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:47,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 16:30:47,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:30:47,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-12-13 16:30:47,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-12-13 16:30:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:30:47,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:30:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:30:47,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244956137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:30:47,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:30:47,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 24 [2022-12-13 16:30:47,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670869947] [2022-12-13 16:30:47,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:30:47,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:30:47,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:47,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:30:47,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:30:47,697 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:49,808 INFO L93 Difference]: Finished difference Result 237 states and 259 transitions. [2022-12-13 16:30:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 16:30:49,809 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-13 16:30:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:49,809 INFO L225 Difference]: With dead ends: 237 [2022-12-13 16:30:49,810 INFO L226 Difference]: Without dead ends: 237 [2022-12-13 16:30:49,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2022-12-13 16:30:49,811 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 828 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:49,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 618 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 16:30:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-13 16:30:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 153. [2022-12-13 16:30:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 129 states have (on average 1.3488372093023255) internal successors, (174), 152 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2022-12-13 16:30:49,814 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 30 [2022-12-13 16:30:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:49,814 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2022-12-13 16:30:49,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2022-12-13 16:30:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 16:30:49,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:49,815 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:49,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:30:50,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:50,017 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:50,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2056569881, now seen corresponding path program 1 times [2022-12-13 16:30:50,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:50,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491061599] [2022-12-13 16:30:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:50,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:50,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:50,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491061599] [2022-12-13 16:30:50,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491061599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:30:50,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308063564] [2022-12-13 16:30:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:50,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:50,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:30:50,391 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:30:50,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:30:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:50,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 16:30:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:30:50,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:30:50,643 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:30:50,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:30:50,676 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:30:50,682 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:30:50,836 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:50,837 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 29 [2022-12-13 16:30:50,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:50,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 16:30:50,871 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:50,871 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-13 16:30:50,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 16:30:51,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:51,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-13 16:30:51,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:51,016 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 16:30:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:51,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:30:51,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:51,775 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 16:30:51,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:51,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-13 16:30:51,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-12-13 16:30:51,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:51,826 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-12-13 16:30:51,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:51,834 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 16:30:51,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:51,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:51,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:51,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-13 16:30:51,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:51,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:51,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:30:51,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-12-13 16:30:52,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:52,163 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 129 [2022-12-13 16:30:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:52,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308063564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:30:52,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:30:52,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2022-12-13 16:30:52,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372452374] [2022-12-13 16:30:52,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:30:52,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 16:30:52,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:52,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 16:30:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1127, Unknown=15, NotChecked=0, Total=1260 [2022-12-13 16:30:52,815 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 36 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) [2022-12-13 16:30:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:30:54,844 INFO L93 Difference]: Finished difference Result 267 states and 295 transitions. [2022-12-13 16:30:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 16:30:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 36 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) Word has length 31 [2022-12-13 16:30:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:30:54,846 INFO L225 Difference]: With dead ends: 267 [2022-12-13 16:30:54,846 INFO L226 Difference]: Without dead ends: 267 [2022-12-13 16:30:54,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=448, Invalid=2617, Unknown=15, NotChecked=0, Total=3080 [2022-12-13 16:30:54,848 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 421 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:30:54,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 878 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 16:30:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-13 16:30:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 182. [2022-12-13 16:30:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 158 states have (on average 1.3164556962025316) internal successors, (208), 181 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:30:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 208 transitions. [2022-12-13 16:30:54,852 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 208 transitions. Word has length 31 [2022-12-13 16:30:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:30:54,852 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 208 transitions. [2022-12-13 16:30:54,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 36 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) [2022-12-13 16:30:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 208 transitions. [2022-12-13 16:30:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 16:30:54,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:30:54,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:30:54,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 16:30:55,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 16:30:55,055 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:30:55,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:30:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2056569880, now seen corresponding path program 1 times [2022-12-13 16:30:55,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:30:55,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912523326] [2022-12-13 16:30:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:55,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:30:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:55,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:30:55,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912523326] [2022-12-13 16:30:55,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912523326] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:30:55,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459758006] [2022-12-13 16:30:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:30:55,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:30:55,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:30:55,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:30:55,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:30:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:30:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 16:30:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:30:55,525 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 16:30:55,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 16:30:55,561 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:30:55,702 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:55,702 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 29 [2022-12-13 16:30:55,728 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:30:55,728 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 16:30:55,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:55,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-13 16:30:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:55,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:30:57,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:57,361 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 16:30:57,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:57,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-12-13 16:30:57,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-13 16:30:59,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:59,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 111 treesize of output 381 [2022-12-13 16:31:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:02,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459758006] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:02,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:02,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2022-12-13 16:31:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197935219] [2022-12-13 16:31:02,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:02,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 16:31:02,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:02,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 16:31:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=911, Unknown=10, NotChecked=0, Total=1056 [2022-12-13 16:31:02,892 INFO L87 Difference]: Start difference. First operand 182 states and 208 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:31:04,185 INFO L93 Difference]: Finished difference Result 255 states and 285 transitions. [2022-12-13 16:31:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 16:31:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-13 16:31:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:31:04,187 INFO L225 Difference]: With dead ends: 255 [2022-12-13 16:31:04,187 INFO L226 Difference]: Without dead ends: 255 [2022-12-13 16:31:04,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=378, Invalid=1774, Unknown=10, NotChecked=0, Total=2162 [2022-12-13 16:31:04,188 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 422 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 16:31:04,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 801 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 16:31:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-13 16:31:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 181. [2022-12-13 16:31:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 157 states have (on average 1.3121019108280254) internal successors, (206), 180 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 206 transitions. [2022-12-13 16:31:04,191 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 206 transitions. Word has length 31 [2022-12-13 16:31:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:31:04,191 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 206 transitions. [2022-12-13 16:31:04,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 206 transitions. [2022-12-13 16:31:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 16:31:04,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:31:04,191 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:04,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:31:04,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 16:31:04,392 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:31:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:04,392 INFO L85 PathProgramCache]: Analyzing trace with hash 678653734, now seen corresponding path program 1 times [2022-12-13 16:31:04,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:04,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495432897] [2022-12-13 16:31:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:04,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:04,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:04,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495432897] [2022-12-13 16:31:04,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495432897] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:04,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518574245] [2022-12-13 16:31:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:04,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:04,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:04,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:04,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:31:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:04,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:31:04,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:04,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:04,609 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 16:31:04,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-12-13 16:31:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:04,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518574245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:04,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:04,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-12-13 16:31:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302916636] [2022-12-13 16:31:04,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:04,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:31:04,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:31:04,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:31:04,625 INFO L87 Difference]: Start difference. First operand 181 states and 206 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:31:04,846 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2022-12-13 16:31:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:31:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-13 16:31:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:31:04,847 INFO L225 Difference]: With dead ends: 238 [2022-12-13 16:31:04,847 INFO L226 Difference]: Without dead ends: 238 [2022-12-13 16:31:04,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:31:04,848 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 274 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:31:04,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 134 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:31:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-12-13 16:31:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2022-12-13 16:31:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 183 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2022-12-13 16:31:04,850 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 33 [2022-12-13 16:31:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:31:04,851 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2022-12-13 16:31:04,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2022-12-13 16:31:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 16:31:04,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:31:04,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:04,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:31:05,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:05,052 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:31:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 678653735, now seen corresponding path program 1 times [2022-12-13 16:31:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:05,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686407584] [2022-12-13 16:31:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:05,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:05,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686407584] [2022-12-13 16:31:05,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686407584] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:05,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151484632] [2022-12-13 16:31:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:05,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:05,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:05,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:05,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:31:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:05,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 16:31:05,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:05,447 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:31:05,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-12-13 16:31:05,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-12-13 16:31:05,588 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:31:05,589 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-12-13 16:31:05,610 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:31:05,610 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-12-13 16:31:05,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:31:05,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:31:05,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-12-13 16:31:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:05,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:05,861 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_108| Int) (v_ArrVal_972 (Array Int Int))) (or (not (<= |v_ULTIMATE.start_main_~x~0#1.offset_108| |c_ULTIMATE.start_main_~head~0#1.offset|)) (not (= (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_972) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_108|) 0)) (not (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_108|)))) is different from false [2022-12-13 16:31:05,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:31:05,877 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-12-13 16:31:05,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:31:05,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-12-13 16:31:05,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-12-13 16:31:06,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:31:06,259 INFO L350 Elim1Store]: Elim1 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 71 treesize of output 141 [2022-12-13 16:31:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:06,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151484632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:06,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:06,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 29 [2022-12-13 16:31:06,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734546782] [2022-12-13 16:31:06,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:06,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 16:31:06,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:06,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 16:31:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=656, Unknown=5, NotChecked=52, Total=812 [2022-12-13 16:31:06,613 INFO L87 Difference]: Start difference. First operand 184 states and 213 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:31:08,569 INFO L93 Difference]: Finished difference Result 305 states and 345 transitions. [2022-12-13 16:31:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 16:31:08,569 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 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 33 [2022-12-13 16:31:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:31:08,570 INFO L225 Difference]: With dead ends: 305 [2022-12-13 16:31:08,570 INFO L226 Difference]: Without dead ends: 305 [2022-12-13 16:31:08,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=442, Invalid=2007, Unknown=5, NotChecked=96, Total=2550 [2022-12-13 16:31:08,571 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 553 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:31:08,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1022 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1674 Invalid, 0 Unknown, 194 Unchecked, 1.1s Time] [2022-12-13 16:31:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-12-13 16:31:08,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 227. [2022-12-13 16:31:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 204 states have (on average 1.3676470588235294) internal successors, (279), 226 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 279 transitions. [2022-12-13 16:31:08,574 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 279 transitions. Word has length 33 [2022-12-13 16:31:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:31:08,575 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 279 transitions. [2022-12-13 16:31:08,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:31:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 279 transitions. [2022-12-13 16:31:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 16:31:08,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:31:08,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:08,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:31:08,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:08,776 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-12-13 16:31:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1865212554, now seen corresponding path program 2 times [2022-12-13 16:31:08,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:08,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786812574] [2022-12-13 16:31:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:08,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:09,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786812574] [2022-12-13 16:31:09,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786812574] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460584035] [2022-12-13 16:31:09,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:31:09,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:09,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:09,117 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:09,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ecba0f-19d3-4c52-a7e6-2e27013d46f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:31:09,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:31:09,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:31:09,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 16:31:09,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:09,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:31:09,273 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:31:09,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:31:09,297 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:31:09,302 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 16:31:09,403 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-13 16:31:09,404 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 22 [2022-12-13 16:31:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:31:09,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-12-13 16:31:09,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:31:09,454 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 16:31:09,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 70 [2022-12-13 16:31:09,464 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-12-13 16:31:09,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 55 [2022-12-13 16:31:09,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:31:09,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:31:09,763 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-12-13 16:31:09,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 38 [2022-12-13 16:31:09,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:31:09,770 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 16:31:09,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-12-13 16:31:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:09,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:19,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:31:19,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 24256 treesize of output 21636 [2022-12-13 16:31:20,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20067 treesize of output 19955 [2022-12-13 16:35:30,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:35:30,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 660 treesize of output 652 [2022-12-13 16:35:30,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:35:30,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:35:30,749 INFO L321 Elim1Store]: treesize reduction 352, result has 20.7 percent of original size [2022-12-13 16:35:30,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 26382 treesize of output 23917 [2022-12-13 16:35:32,150 INFO L321 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2022-12-13 16:35:32,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23769 treesize of output 22809