./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/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_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/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_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/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 e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- 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 13:25:58,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:25:58,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:25:58,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:25:58,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:25:58,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:25:58,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:25:58,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:25:58,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:25:58,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:25:58,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:25:58,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:25:58,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:25:58,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:25:58,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:25:58,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:25:58,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:25:58,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:25:58,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:25:58,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:25:58,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:25:58,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:25:58,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:25:58,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:25:58,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:25:58,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:25:58,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:25:58,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:25:58,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:25:58,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:25:58,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:25:58,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:25:58,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:25:58,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:25:58,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:25:58,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:25:58,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:25:58,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:25:58,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:25:58,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:25:58,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:25:58,734 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:25:58,747 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:25:58,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:25:58,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:25:58,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:25:58,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:25:58,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:25:58,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:25:58,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:25:58,749 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:25:58,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:25:58,749 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:25:58,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:25:58,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:25:58,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:25:58,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:25:58,750 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:25:58,750 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:25:58,750 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:25:58,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:25:58,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:25:58,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:25:58,751 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:25:58,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:25:58,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:25:58,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:25:58,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:25:58,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:25:58,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:25:58,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:25:58,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:25:58,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:25:58,753 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:25:58,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:25:58,753 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:25:58,753 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_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2022-12-13 13:25:58,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:25:58,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:25:58,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:25:58,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:25:58,944 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:25:58,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-12-13 13:26:01,586 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:26:01,792 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:26:01,793 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-12-13 13:26:01,801 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/data/1871918c3/e9120ad4780b45c8972ccd32c9986621/FLAG8e585d45d [2022-12-13 13:26:01,812 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/data/1871918c3/e9120ad4780b45c8972ccd32c9986621 [2022-12-13 13:26:01,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:26:01,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:26:01,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:26:01,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:26:01,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:26:01,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:26:01" (1/1) ... [2022-12-13 13:26:01,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff51459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:01, skipping insertion in model container [2022-12-13 13:26:01,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:26:01" (1/1) ... [2022-12-13 13:26:01,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:26:01,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:26:02,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:26:02,145 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:26:02,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:26:02,214 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:26:02,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02 WrapperNode [2022-12-13 13:26:02,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:26:02,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:26:02,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:26:02,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:26:02,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,263 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 249 [2022-12-13 13:26:02,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:26:02,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:26:02,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:26:02,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:26:02,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,292 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:26:02,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:26:02,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:26:02,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:26:02,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (1/1) ... [2022-12-13 13:26:02,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:26:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:02,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:26:02,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:26:02,361 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-12-13 13:26:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-12-13 13:26:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:26:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:26:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:26:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 13:26:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 13:26:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:26:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 13:26:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:26:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:26:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:26:02,475 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:26:02,477 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:26:02,861 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:26:02,866 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:26:02,866 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 13:26:02,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:26:02 BoogieIcfgContainer [2022-12-13 13:26:02,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:26:02,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:26:02,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:26:02,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:26:02,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:26:01" (1/3) ... [2022-12-13 13:26:02,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fc7b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:26:02, skipping insertion in model container [2022-12-13 13:26:02,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:26:02" (2/3) ... [2022-12-13 13:26:02,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fc7b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:26:02, skipping insertion in model container [2022-12-13 13:26:02,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:26:02" (3/3) ... [2022-12-13 13:26:02,874 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2022-12-13 13:26:02,888 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:26:02,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-12-13 13:26:02,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:26:02,939 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;@b93ec82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:26:02,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-12-13 13:26:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 166 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 13:26:02,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:02,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:26:02,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:02,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:02,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1045674122, now seen corresponding path program 1 times [2022-12-13 13:26:02,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:02,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875123631] [2022-12-13 13:26:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:02,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:03,076 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 13:26:03,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:03,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875123631] [2022-12-13 13:26:03,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875123631] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:03,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:03,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:26:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055951636] [2022-12-13 13:26:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:03,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:26:03,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:03,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:26:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:26:03,113 INFO L87 Difference]: Start difference. First operand has 170 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 166 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:26:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:03,142 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2022-12-13 13:26:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:26:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 13:26:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:03,150 INFO L225 Difference]: With dead ends: 170 [2022-12-13 13:26:03,150 INFO L226 Difference]: Without dead ends: 168 [2022-12-13 13:26:03,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:26:03,155 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:03,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-13 13:26:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-12-13 13:26:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 98 states have (on average 1.8979591836734695) internal successors, (186), 164 states have internal predecessors, (186), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2022-12-13 13:26:03,192 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 6 [2022-12-13 13:26:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:03,193 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2022-12-13 13:26:03,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:26:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2022-12-13 13:26:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 13:26:03,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:03,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:03,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:26:03,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:03,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:03,195 INFO L85 PathProgramCache]: Analyzing trace with hash 594374512, now seen corresponding path program 1 times [2022-12-13 13:26:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:03,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969822975] [2022-12-13 13:26:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:03,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:03,289 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 13:26:03,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:03,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969822975] [2022-12-13 13:26:03,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969822975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:03,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:03,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:26:03,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71372651] [2022-12-13 13:26:03,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:03,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:03,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:03,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:03,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:03,294 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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 13:26:03,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:03,347 INFO L93 Difference]: Finished difference Result 331 states and 375 transitions. [2022-12-13 13:26:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:03,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 13:26:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:03,350 INFO L225 Difference]: With dead ends: 331 [2022-12-13 13:26:03,350 INFO L226 Difference]: Without dead ends: 331 [2022-12-13 13:26:03,350 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 13:26:03,352 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 180 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:03,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 697 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:03,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-12-13 13:26:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 170. [2022-12-13 13:26:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 100 states have (on average 1.88) internal successors, (188), 166 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2022-12-13 13:26:03,368 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 8 [2022-12-13 13:26:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:03,368 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2022-12-13 13:26:03,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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 13:26:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2022-12-13 13:26:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 13:26:03,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:03,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:03,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:26:03,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash 592527470, now seen corresponding path program 1 times [2022-12-13 13:26:03,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:03,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636940741] [2022-12-13 13:26:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:03,460 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 13:26:03,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:03,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636940741] [2022-12-13 13:26:03,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636940741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:03,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:03,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:26:03,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799433887] [2022-12-13 13:26:03,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:03,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:26:03,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:26:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:26:03,463 INFO L87 Difference]: Start difference. First operand 170 states and 192 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 13:26:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:03,634 INFO L93 Difference]: Finished difference Result 329 states and 372 transitions. [2022-12-13 13:26:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:26:03,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 13:26:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:03,637 INFO L225 Difference]: With dead ends: 329 [2022-12-13 13:26:03,637 INFO L226 Difference]: Without dead ends: 329 [2022-12-13 13:26:03,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:26:03,639 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 170 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:03,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 249 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-12-13 13:26:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 237. [2022-12-13 13:26:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 164 states have (on average 1.8658536585365855) internal successors, (306), 230 states have internal predecessors, (306), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:26:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2022-12-13 13:26:03,653 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 8 [2022-12-13 13:26:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:03,653 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2022-12-13 13:26:03,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 13:26:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2022-12-13 13:26:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 13:26:03,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:03,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:03,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:26:03,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash 592527471, now seen corresponding path program 1 times [2022-12-13 13:26:03,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:03,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608591238] [2022-12-13 13:26:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:03,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:03,775 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 13:26:03,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608591238] [2022-12-13 13:26:03,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608591238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:03,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:03,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:26:03,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355240597] [2022-12-13 13:26:03,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:03,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:03,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:03,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:03,778 INFO L87 Difference]: Start difference. First operand 237 states and 314 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 13:26:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:03,933 INFO L93 Difference]: Finished difference Result 384 states and 490 transitions. [2022-12-13 13:26:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 13:26:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:03,936 INFO L225 Difference]: With dead ends: 384 [2022-12-13 13:26:03,936 INFO L226 Difference]: Without dead ends: 384 [2022-12-13 13:26:03,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:03,937 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 141 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:03,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 419 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:03,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-12-13 13:26:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2022-12-13 13:26:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 239 states have (on average 1.8284518828451883) internal successors, (437), 307 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2022-12-13 13:26:03,947 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2022-12-13 13:26:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:03,947 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2022-12-13 13:26:03,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 13:26:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2022-12-13 13:26:03,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 13:26:03,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:03,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:03,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:26:03,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash 592527533, now seen corresponding path program 1 times [2022-12-13 13:26:03,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:03,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917865425] [2022-12-13 13:26:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:04,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917865425] [2022-12-13 13:26:04,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917865425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:04,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:04,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:26:04,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724362625] [2022-12-13 13:26:04,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:04,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:04,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:04,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:04,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:04,032 INFO L87 Difference]: Start difference. First operand 318 states and 453 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 13:26:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:04,170 INFO L93 Difference]: Finished difference Result 383 states and 488 transitions. [2022-12-13 13:26:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 13:26:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:04,172 INFO L225 Difference]: With dead ends: 383 [2022-12-13 13:26:04,172 INFO L226 Difference]: Without dead ends: 383 [2022-12-13 13:26:04,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:04,173 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 123 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:04,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 434 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:04,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-12-13 13:26:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 318. [2022-12-13 13:26:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 239 states have (on average 1.8284518828451883) internal successors, (437), 307 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2022-12-13 13:26:04,181 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2022-12-13 13:26:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:04,182 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2022-12-13 13:26:04,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 13:26:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2022-12-13 13:26:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 13:26:04,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:04,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:04,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:26:04,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:04,183 INFO L85 PathProgramCache]: Analyzing trace with hash -329469321, now seen corresponding path program 1 times [2022-12-13 13:26:04,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:04,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078435883] [2022-12-13 13:26:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:04,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,203 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 13:26:04,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:04,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078435883] [2022-12-13 13:26:04,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078435883] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:04,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:04,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:26:04,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119941585] [2022-12-13 13:26:04,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:04,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:26:04,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:26:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:26:04,205 INFO L87 Difference]: Start difference. First operand 318 states and 453 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:26:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:04,221 INFO L93 Difference]: Finished difference Result 459 states and 609 transitions. [2022-12-13 13:26:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:26:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 13:26:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:04,222 INFO L225 Difference]: With dead ends: 459 [2022-12-13 13:26:04,222 INFO L226 Difference]: Without dead ends: 459 [2022-12-13 13:26:04,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:26:04,223 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 161 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:04,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 372 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-12-13 13:26:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 320. [2022-12-13 13:26:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 241 states have (on average 1.8132780082987552) internal successors, (437), 309 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 453 transitions. [2022-12-13 13:26:04,232 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 453 transitions. Word has length 11 [2022-12-13 13:26:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:04,233 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 453 transitions. [2022-12-13 13:26:04,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:26:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 453 transitions. [2022-12-13 13:26:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 13:26:04,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:04,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:04,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:26:04,234 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1623615594, now seen corresponding path program 1 times [2022-12-13 13:26:04,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:04,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821126376] [2022-12-13 13:26:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:04,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,260 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 13:26:04,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:04,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821126376] [2022-12-13 13:26:04,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821126376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:04,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:04,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:26:04,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640721461] [2022-12-13 13:26:04,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:04,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:26:04,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:26:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:26:04,262 INFO L87 Difference]: Start difference. First operand 320 states and 453 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 13:26:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:04,343 INFO L93 Difference]: Finished difference Result 371 states and 500 transitions. [2022-12-13 13:26:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:26:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 13:26:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:04,346 INFO L225 Difference]: With dead ends: 371 [2022-12-13 13:26:04,346 INFO L226 Difference]: Without dead ends: 364 [2022-12-13 13:26:04,346 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 13:26:04,346 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 71 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:04,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 287 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-12-13 13:26:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 317. [2022-12-13 13:26:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 238 states have (on average 1.815126050420168) internal successors, (432), 306 states have internal predecessors, (432), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 448 transitions. [2022-12-13 13:26:04,353 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 448 transitions. Word has length 12 [2022-12-13 13:26:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:04,353 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 448 transitions. [2022-12-13 13:26:04,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 13:26:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 448 transitions. [2022-12-13 13:26:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 13:26:04,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:04,354 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 13:26:04,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:26:04,354 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:04,354 INFO L85 PathProgramCache]: Analyzing trace with hash -321333405, now seen corresponding path program 1 times [2022-12-13 13:26:04,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:04,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000995288] [2022-12-13 13:26:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:04,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,385 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 13:26:04,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:04,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000995288] [2022-12-13 13:26:04,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000995288] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:04,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:04,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:26:04,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210315076] [2022-12-13 13:26:04,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:04,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:04,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:04,386 INFO L87 Difference]: Start difference. First operand 317 states and 448 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:04,403 INFO L93 Difference]: Finished difference Result 515 states and 714 transitions. [2022-12-13 13:26:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:04,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-13 13:26:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:04,405 INFO L225 Difference]: With dead ends: 515 [2022-12-13 13:26:04,405 INFO L226 Difference]: Without dead ends: 515 [2022-12-13 13:26:04,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 13:26:04,406 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 176 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:04,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 536 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:04,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-12-13 13:26:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 321. [2022-12-13 13:26:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 242 states have (on average 1.7933884297520661) internal successors, (434), 310 states have internal predecessors, (434), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2022-12-13 13:26:04,413 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 17 [2022-12-13 13:26:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:04,413 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2022-12-13 13:26:04,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2022-12-13 13:26:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 13:26:04,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:04,414 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 13:26:04,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:26:04,414 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1022397983, now seen corresponding path program 1 times [2022-12-13 13:26:04,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:04,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334385631] [2022-12-13 13:26:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:04,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,430 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 13:26:04,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:04,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334385631] [2022-12-13 13:26:04,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334385631] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:04,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:04,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:26:04,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712297378] [2022-12-13 13:26:04,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:04,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:26:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:26:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:26:04,432 INFO L87 Difference]: Start difference. First operand 321 states and 450 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:04,441 INFO L93 Difference]: Finished difference Result 325 states and 454 transitions. [2022-12-13 13:26:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:26:04,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-13 13:26:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:04,442 INFO L225 Difference]: With dead ends: 325 [2022-12-13 13:26:04,442 INFO L226 Difference]: Without dead ends: 325 [2022-12-13 13:26:04,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:26:04,443 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:04,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 373 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-12-13 13:26:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2022-12-13 13:26:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 246 states have (on average 1.7804878048780488) internal successors, (438), 314 states have internal predecessors, (438), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 454 transitions. [2022-12-13 13:26:04,449 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 454 transitions. Word has length 17 [2022-12-13 13:26:04,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:04,449 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 454 transitions. [2022-12-13 13:26:04,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 454 transitions. [2022-12-13 13:26:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 13:26:04,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:04,449 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 13:26:04,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:26:04,450 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:04,450 INFO L85 PathProgramCache]: Analyzing trace with hash -213051357, now seen corresponding path program 1 times [2022-12-13 13:26:04,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:04,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216035530] [2022-12-13 13:26:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:04,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,504 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 13:26:04,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:04,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216035530] [2022-12-13 13:26:04,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216035530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:04,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:04,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:26:04,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878309111] [2022-12-13 13:26:04,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:04,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:04,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:04,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:04,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:04,505 INFO L87 Difference]: Start difference. First operand 325 states and 454 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:04,726 INFO L93 Difference]: Finished difference Result 550 states and 690 transitions. [2022-12-13 13:26:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:04,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-13 13:26:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:04,730 INFO L225 Difference]: With dead ends: 550 [2022-12-13 13:26:04,730 INFO L226 Difference]: Without dead ends: 550 [2022-12-13 13:26:04,730 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 13:26:04,731 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 328 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:04,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 440 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-12-13 13:26:04,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 331. [2022-12-13 13:26:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 252 states have (on average 1.7619047619047619) internal successors, (444), 320 states have internal predecessors, (444), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 460 transitions. [2022-12-13 13:26:04,745 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 460 transitions. Word has length 17 [2022-12-13 13:26:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:04,745 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 460 transitions. [2022-12-13 13:26:04,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 460 transitions. [2022-12-13 13:26:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 13:26:04,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:04,746 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 13:26:04,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:26:04,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:04,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:04,747 INFO L85 PathProgramCache]: Analyzing trace with hash -213051356, now seen corresponding path program 1 times [2022-12-13 13:26:04,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:04,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990941767] [2022-12-13 13:26:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:04,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:04,847 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 13:26:04,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:04,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990941767] [2022-12-13 13:26:04,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990941767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:04,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:04,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:26:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586728618] [2022-12-13 13:26:04,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:04,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:04,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:04,849 INFO L87 Difference]: Start difference. First operand 331 states and 460 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:05,012 INFO L93 Difference]: Finished difference Result 378 states and 479 transitions. [2022-12-13 13:26:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:05,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-13 13:26:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:05,014 INFO L225 Difference]: With dead ends: 378 [2022-12-13 13:26:05,014 INFO L226 Difference]: Without dead ends: 378 [2022-12-13 13:26:05,015 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 13:26:05,015 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 172 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:05,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 442 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-12-13 13:26:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 331. [2022-12-13 13:26:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 252 states have (on average 1.7380952380952381) internal successors, (438), 320 states have internal predecessors, (438), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 454 transitions. [2022-12-13 13:26:05,024 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 454 transitions. Word has length 17 [2022-12-13 13:26:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:05,025 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 454 transitions. [2022-12-13 13:26:05,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 454 transitions. [2022-12-13 13:26:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 13:26:05,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:05,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:05,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 13:26:05,026 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash 490210144, now seen corresponding path program 1 times [2022-12-13 13:26:05,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:05,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479335928] [2022-12-13 13:26:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:05,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:05,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:05,119 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 13:26:05,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479335928] [2022-12-13 13:26:05,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479335928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:05,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:05,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:26:05,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582819571] [2022-12-13 13:26:05,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:05,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:26:05,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:05,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:26:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:05,121 INFO L87 Difference]: Start difference. First operand 331 states and 454 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:05,446 INFO L93 Difference]: Finished difference Result 680 states and 803 transitions. [2022-12-13 13:26:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:26:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-12-13 13:26:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:05,449 INFO L225 Difference]: With dead ends: 680 [2022-12-13 13:26:05,449 INFO L226 Difference]: Without dead ends: 680 [2022-12-13 13:26:05,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:26:05,450 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 805 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:05,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 562 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 13:26:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-12-13 13:26:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 328. [2022-12-13 13:26:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 253 states have (on average 1.7075098814229248) internal successors, (432), 317 states have internal predecessors, (432), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 448 transitions. [2022-12-13 13:26:05,457 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 448 transitions. Word has length 18 [2022-12-13 13:26:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:05,457 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 448 transitions. [2022-12-13 13:26:05,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 448 transitions. [2022-12-13 13:26:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 13:26:05,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:05,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:05,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:26:05,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash 490210145, now seen corresponding path program 1 times [2022-12-13 13:26:05,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:05,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379459088] [2022-12-13 13:26:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:05,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:05,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:05,615 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 13:26:05,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379459088] [2022-12-13 13:26:05,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379459088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:05,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:05,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:26:05,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743338922] [2022-12-13 13:26:05,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:05,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:05,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:05,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:05,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:05,617 INFO L87 Difference]: Start difference. First operand 328 states and 448 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:06,171 INFO L93 Difference]: Finished difference Result 662 states and 804 transitions. [2022-12-13 13:26:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:26:06,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-12-13 13:26:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:06,175 INFO L225 Difference]: With dead ends: 662 [2022-12-13 13:26:06,175 INFO L226 Difference]: Without dead ends: 662 [2022-12-13 13:26:06,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:26:06,176 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 622 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:06,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 668 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:26:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-12-13 13:26:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 348. [2022-12-13 13:26:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 273 states have (on average 1.7106227106227105) internal successors, (467), 337 states have internal predecessors, (467), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:26:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 483 transitions. [2022-12-13 13:26:06,186 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 483 transitions. Word has length 18 [2022-12-13 13:26:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:06,186 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 483 transitions. [2022-12-13 13:26:06,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 483 transitions. [2022-12-13 13:26:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 13:26:06,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:06,187 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 13:26:06,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 13:26:06,188 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash -254199642, now seen corresponding path program 1 times [2022-12-13 13:26:06,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:06,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920131877] [2022-12-13 13:26:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:06,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:06,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:06,498 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 13:26:06,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:06,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920131877] [2022-12-13 13:26:06,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920131877] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:06,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:06,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 13:26:06,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695784208] [2022-12-13 13:26:06,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:06,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:26:06,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:06,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:26:06,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:26:06,500 INFO L87 Difference]: Start difference. First operand 348 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:06,803 INFO L93 Difference]: Finished difference Result 532 states and 706 transitions. [2022-12-13 13:26:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:26:06,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-13 13:26:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:06,805 INFO L225 Difference]: With dead ends: 532 [2022-12-13 13:26:06,805 INFO L226 Difference]: Without dead ends: 532 [2022-12-13 13:26:06,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:26:06,806 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 198 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:06,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 936 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-12-13 13:26:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 407. [2022-12-13 13:26:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 329 states have (on average 1.674772036474164) internal successors, (551), 392 states have internal predecessors, (551), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 571 transitions. [2022-12-13 13:26:06,817 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 571 transitions. Word has length 22 [2022-12-13 13:26:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:06,817 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 571 transitions. [2022-12-13 13:26:06,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 571 transitions. [2022-12-13 13:26:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 13:26:06,818 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:06,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:06,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 13:26:06,818 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:06,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1832886663, now seen corresponding path program 1 times [2022-12-13 13:26:06,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:06,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927733893] [2022-12-13 13:26:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:06,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:07,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:07,187 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 13:26:07,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:07,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927733893] [2022-12-13 13:26:07,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927733893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:07,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:07,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 13:26:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804725289] [2022-12-13 13:26:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:07,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:26:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:26:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:26:07,189 INFO L87 Difference]: Start difference. First operand 407 states and 571 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:07,839 INFO L93 Difference]: Finished difference Result 754 states and 1029 transitions. [2022-12-13 13:26:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:26:07,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-12-13 13:26:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:07,843 INFO L225 Difference]: With dead ends: 754 [2022-12-13 13:26:07,843 INFO L226 Difference]: Without dead ends: 752 [2022-12-13 13:26:07,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:26:07,844 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 531 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:07,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1549 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:26:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-12-13 13:26:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 401. [2022-12-13 13:26:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 323 states have (on average 1.671826625386997) internal successors, (540), 386 states have internal predecessors, (540), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 560 transitions. [2022-12-13 13:26:07,861 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 560 transitions. Word has length 23 [2022-12-13 13:26:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:07,861 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 560 transitions. [2022-12-13 13:26:07,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 560 transitions. [2022-12-13 13:26:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 13:26:07,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:07,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:07,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 13:26:07,863 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash 499344936, now seen corresponding path program 1 times [2022-12-13 13:26:07,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:07,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53751530] [2022-12-13 13:26:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:07,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:07,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:07,966 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 13:26:07,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:07,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53751530] [2022-12-13 13:26:07,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53751530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:07,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:07,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:26:07,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6063403] [2022-12-13 13:26:07,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:07,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:07,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:07,968 INFO L87 Difference]: Start difference. First operand 401 states and 560 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:08,040 INFO L93 Difference]: Finished difference Result 434 states and 563 transitions. [2022-12-13 13:26:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:26:08,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-12-13 13:26:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:08,042 INFO L225 Difference]: With dead ends: 434 [2022-12-13 13:26:08,042 INFO L226 Difference]: Without dead ends: 434 [2022-12-13 13:26:08,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:26:08,043 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 246 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:08,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1007 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:08,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-12-13 13:26:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 401. [2022-12-13 13:26:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 323 states have (on average 1.6656346749226005) internal successors, (538), 386 states have internal predecessors, (538), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:08,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 558 transitions. [2022-12-13 13:26:08,053 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 558 transitions. Word has length 23 [2022-12-13 13:26:08,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:08,053 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 558 transitions. [2022-12-13 13:26:08,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,053 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 558 transitions. [2022-12-13 13:26:08,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 13:26:08,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:08,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:08,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 13:26:08,054 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2020614998, now seen corresponding path program 1 times [2022-12-13 13:26:08,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:08,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799628656] [2022-12-13 13:26:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:08,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:08,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:08,160 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 13:26:08,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:08,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799628656] [2022-12-13 13:26:08,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799628656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:08,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:08,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:26:08,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704517746] [2022-12-13 13:26:08,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:08,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:08,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:08,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:08,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:08,162 INFO L87 Difference]: Start difference. First operand 401 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:08,222 INFO L93 Difference]: Finished difference Result 430 states and 555 transitions. [2022-12-13 13:26:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:26:08,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-12-13 13:26:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:08,224 INFO L225 Difference]: With dead ends: 430 [2022-12-13 13:26:08,224 INFO L226 Difference]: Without dead ends: 430 [2022-12-13 13:26:08,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:26:08,225 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 243 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:08,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1008 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-12-13 13:26:08,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 399. [2022-12-13 13:26:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 321 states have (on average 1.6573208722741433) internal successors, (532), 384 states have internal predecessors, (532), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 552 transitions. [2022-12-13 13:26:08,233 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 552 transitions. Word has length 23 [2022-12-13 13:26:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:08,234 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 552 transitions. [2022-12-13 13:26:08,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 552 transitions. [2022-12-13 13:26:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 13:26:08,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:08,234 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] [2022-12-13 13:26:08,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 13:26:08,235 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:08,235 INFO L85 PathProgramCache]: Analyzing trace with hash 535975453, now seen corresponding path program 1 times [2022-12-13 13:26:08,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:08,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726815112] [2022-12-13 13:26:08,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:08,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:08,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:08,273 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 13:26:08,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:08,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726815112] [2022-12-13 13:26:08,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726815112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:08,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:08,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:26:08,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521740138] [2022-12-13 13:26:08,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:08,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:26:08,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:26:08,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:26:08,275 INFO L87 Difference]: Start difference. First operand 399 states and 552 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:08,361 INFO L93 Difference]: Finished difference Result 487 states and 646 transitions. [2022-12-13 13:26:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:26:08,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-12-13 13:26:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:08,363 INFO L225 Difference]: With dead ends: 487 [2022-12-13 13:26:08,363 INFO L226 Difference]: Without dead ends: 487 [2022-12-13 13:26:08,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 13:26:08,363 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 150 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:08,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 273 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-12-13 13:26:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 396. [2022-12-13 13:26:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 321 states have (on average 1.6292834890965733) internal successors, (523), 381 states have internal predecessors, (523), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 543 transitions. [2022-12-13 13:26:08,373 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 543 transitions. Word has length 24 [2022-12-13 13:26:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:08,373 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 543 transitions. [2022-12-13 13:26:08,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 543 transitions. [2022-12-13 13:26:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 13:26:08,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:08,374 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] [2022-12-13 13:26:08,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 13:26:08,374 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash 535975454, now seen corresponding path program 1 times [2022-12-13 13:26:08,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:08,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222683573] [2022-12-13 13:26:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:08,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:08,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:08,459 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 13:26:08,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222683573] [2022-12-13 13:26:08,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222683573] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:08,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:08,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:26:08,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620034222] [2022-12-13 13:26:08,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:08,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:08,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:08,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:08,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:08,461 INFO L87 Difference]: Start difference. First operand 396 states and 543 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:08,563 INFO L93 Difference]: Finished difference Result 425 states and 540 transitions. [2022-12-13 13:26:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:08,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-12-13 13:26:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:08,566 INFO L225 Difference]: With dead ends: 425 [2022-12-13 13:26:08,566 INFO L226 Difference]: Without dead ends: 425 [2022-12-13 13:26:08,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:08,567 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 159 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:08,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 354 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-12-13 13:26:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 394. [2022-12-13 13:26:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 321 states have (on average 1.6105919003115265) internal successors, (517), 379 states have internal predecessors, (517), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 537 transitions. [2022-12-13 13:26:08,574 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 537 transitions. Word has length 24 [2022-12-13 13:26:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:08,574 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 537 transitions. [2022-12-13 13:26:08,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 537 transitions. [2022-12-13 13:26:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 13:26:08,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:08,574 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] [2022-12-13 13:26:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 13:26:08,575 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash 475133714, now seen corresponding path program 1 times [2022-12-13 13:26:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:08,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758017356] [2022-12-13 13:26:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:08,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:08,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:08,621 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 13:26:08,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:08,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758017356] [2022-12-13 13:26:08,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758017356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:08,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:08,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:26:08,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204671178] [2022-12-13 13:26:08,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:08,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:08,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:08,623 INFO L87 Difference]: Start difference. First operand 394 states and 537 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:08,828 INFO L93 Difference]: Finished difference Result 619 states and 786 transitions. [2022-12-13 13:26:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:08,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-12-13 13:26:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:08,829 INFO L225 Difference]: With dead ends: 619 [2022-12-13 13:26:08,829 INFO L226 Difference]: Without dead ends: 619 [2022-12-13 13:26:08,830 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 13:26:08,830 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 286 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:08,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 428 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-12-13 13:26:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 414. [2022-12-13 13:26:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 341 states have (on average 1.6334310850439884) internal successors, (557), 399 states have internal predecessors, (557), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 577 transitions. [2022-12-13 13:26:08,842 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 577 transitions. Word has length 25 [2022-12-13 13:26:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:08,842 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 577 transitions. [2022-12-13 13:26:08,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 577 transitions. [2022-12-13 13:26:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 13:26:08,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:08,843 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] [2022-12-13 13:26:08,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 13:26:08,843 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash 475133715, now seen corresponding path program 1 times [2022-12-13 13:26:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:08,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698180957] [2022-12-13 13:26:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:08,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:09,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:09,037 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 13:26:09,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:09,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698180957] [2022-12-13 13:26:09,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698180957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:09,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:09,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:26:09,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040466312] [2022-12-13 13:26:09,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:09,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:09,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:09,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:09,039 INFO L87 Difference]: Start difference. First operand 414 states and 577 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:09,306 INFO L93 Difference]: Finished difference Result 457 states and 592 transitions. [2022-12-13 13:26:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:26:09,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-12-13 13:26:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:09,308 INFO L225 Difference]: With dead ends: 457 [2022-12-13 13:26:09,308 INFO L226 Difference]: Without dead ends: 457 [2022-12-13 13:26:09,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:26:09,309 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 238 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:09,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 609 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:09,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-12-13 13:26:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 414. [2022-12-13 13:26:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 341 states have (on average 1.6070381231671553) internal successors, (548), 399 states have internal predecessors, (548), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 568 transitions. [2022-12-13 13:26:09,317 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 568 transitions. Word has length 25 [2022-12-13 13:26:09,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:09,318 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 568 transitions. [2022-12-13 13:26:09,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 568 transitions. [2022-12-13 13:26:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 13:26:09,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:09,319 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] [2022-12-13 13:26:09,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 13:26:09,319 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash -323662464, now seen corresponding path program 1 times [2022-12-13 13:26:09,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:09,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345035677] [2022-12-13 13:26:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:09,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:09,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:09,407 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 13:26:09,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:09,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345035677] [2022-12-13 13:26:09,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345035677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:09,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:09,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:26:09,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009924369] [2022-12-13 13:26:09,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:09,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:09,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:09,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:09,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:09,409 INFO L87 Difference]: Start difference. First operand 414 states and 568 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:09,504 INFO L93 Difference]: Finished difference Result 441 states and 568 transitions. [2022-12-13 13:26:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-12-13 13:26:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:09,505 INFO L225 Difference]: With dead ends: 441 [2022-12-13 13:26:09,505 INFO L226 Difference]: Without dead ends: 441 [2022-12-13 13:26:09,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:09,506 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 156 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:09,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 352 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:09,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-12-13 13:26:09,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 413. [2022-12-13 13:26:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 341 states have (on average 1.598240469208211) internal successors, (545), 398 states have internal predecessors, (545), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 565 transitions. [2022-12-13 13:26:09,513 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 565 transitions. Word has length 26 [2022-12-13 13:26:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:09,514 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 565 transitions. [2022-12-13 13:26:09,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 565 transitions. [2022-12-13 13:26:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 13:26:09,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:09,514 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] [2022-12-13 13:26:09,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 13:26:09,514 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:09,515 INFO L85 PathProgramCache]: Analyzing trace with hash -323662657, now seen corresponding path program 1 times [2022-12-13 13:26:09,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:09,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564980289] [2022-12-13 13:26:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:09,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:09,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:09,597 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 13:26:09,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:09,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564980289] [2022-12-13 13:26:09,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564980289] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:09,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:09,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:26:09,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112155538] [2022-12-13 13:26:09,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:09,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:26:09,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:26:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:26:09,599 INFO L87 Difference]: Start difference. First operand 413 states and 565 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:09,764 INFO L93 Difference]: Finished difference Result 625 states and 836 transitions. [2022-12-13 13:26:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:26:09,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-12-13 13:26:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:09,766 INFO L225 Difference]: With dead ends: 625 [2022-12-13 13:26:09,766 INFO L226 Difference]: Without dead ends: 625 [2022-12-13 13:26:09,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:26:09,766 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 161 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:09,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1044 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-12-13 13:26:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 443. [2022-12-13 13:26:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 371 states have (on average 1.5633423180592991) internal successors, (580), 428 states have internal predecessors, (580), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 600 transitions. [2022-12-13 13:26:09,772 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 600 transitions. Word has length 26 [2022-12-13 13:26:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:09,773 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 600 transitions. [2022-12-13 13:26:09,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 600 transitions. [2022-12-13 13:26:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 13:26:09,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:09,773 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] [2022-12-13 13:26:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 13:26:09,773 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1503548246, now seen corresponding path program 1 times [2022-12-13 13:26:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:09,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154321862] [2022-12-13 13:26:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:09,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:09,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:09,870 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 13:26:09,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154321862] [2022-12-13 13:26:09,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154321862] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:09,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:09,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:26:09,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584735666] [2022-12-13 13:26:09,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:09,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:26:09,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:26:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:26:09,872 INFO L87 Difference]: Start difference. First operand 443 states and 600 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:10,158 INFO L93 Difference]: Finished difference Result 782 states and 1012 transitions. [2022-12-13 13:26:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:26:10,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-12-13 13:26:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:10,161 INFO L225 Difference]: With dead ends: 782 [2022-12-13 13:26:10,161 INFO L226 Difference]: Without dead ends: 782 [2022-12-13 13:26:10,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:26:10,162 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 507 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:10,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1413 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-12-13 13:26:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 440. [2022-12-13 13:26:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 371 states have (on average 1.536388140161725) internal successors, (570), 425 states have internal predecessors, (570), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 590 transitions. [2022-12-13 13:26:10,173 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 590 transitions. Word has length 28 [2022-12-13 13:26:10,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:10,173 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 590 transitions. [2022-12-13 13:26:10,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:10,173 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 590 transitions. [2022-12-13 13:26:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 13:26:10,174 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:10,174 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] [2022-12-13 13:26:10,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 13:26:10,174 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash 634621977, now seen corresponding path program 1 times [2022-12-13 13:26:10,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:10,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689759982] [2022-12-13 13:26:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:10,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:10,290 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 13:26:10,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:10,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689759982] [2022-12-13 13:26:10,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689759982] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:10,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:10,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:26:10,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507661863] [2022-12-13 13:26:10,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:10,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:26:10,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:10,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:26:10,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:10,292 INFO L87 Difference]: Start difference. First operand 440 states and 590 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:10,434 INFO L93 Difference]: Finished difference Result 505 states and 649 transitions. [2022-12-13 13:26:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:26:10,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-12-13 13:26:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:10,436 INFO L225 Difference]: With dead ends: 505 [2022-12-13 13:26:10,437 INFO L226 Difference]: Without dead ends: 505 [2022-12-13 13:26:10,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:26:10,437 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 154 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:10,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 635 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-12-13 13:26:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 440. [2022-12-13 13:26:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 371 states have (on average 1.5336927223719676) internal successors, (569), 425 states have internal predecessors, (569), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:26:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 589 transitions. [2022-12-13 13:26:10,443 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 589 transitions. Word has length 29 [2022-12-13 13:26:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:10,443 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 589 transitions. [2022-12-13 13:26:10,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 589 transitions. [2022-12-13 13:26:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 13:26:10,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:10,444 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] [2022-12-13 13:26:10,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 13:26:10,444 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1800846934, now seen corresponding path program 1 times [2022-12-13 13:26:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765891161] [2022-12-13 13:26:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:10,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:26:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:10,711 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 13:26:10,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765891161] [2022-12-13 13:26:10,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765891161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:10,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:10,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 13:26:10,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595176577] [2022-12-13 13:26:10,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:10,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 13:26:10,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:10,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 13:26:10,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:26:10,713 INFO L87 Difference]: Start difference. First operand 440 states and 589 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:11,130 INFO L93 Difference]: Finished difference Result 637 states and 784 transitions. [2022-12-13 13:26:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:26:11,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-12-13 13:26:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:11,131 INFO L225 Difference]: With dead ends: 637 [2022-12-13 13:26:11,131 INFO L226 Difference]: Without dead ends: 637 [2022-12-13 13:26:11,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:26:11,132 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 709 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2347 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:11,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 2347 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 13:26:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-12-13 13:26:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 328. [2022-12-13 13:26:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 265 states have (on average 1.5320754716981133) internal successors, (406), 318 states have internal predecessors, (406), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:26:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 418 transitions. [2022-12-13 13:26:11,136 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 418 transitions. Word has length 30 [2022-12-13 13:26:11,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:11,137 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 418 transitions. [2022-12-13 13:26:11,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:11,137 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 418 transitions. [2022-12-13 13:26:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 13:26:11,137 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:11,137 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, 1] [2022-12-13 13:26:11,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 13:26:11,137 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:11,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048724, now seen corresponding path program 1 times [2022-12-13 13:26:11,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:11,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705365565] [2022-12-13 13:26:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:11,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:11,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:11,192 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 13:26:11,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:11,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705365565] [2022-12-13 13:26:11,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705365565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:11,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:11,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:26:11,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203988100] [2022-12-13 13:26:11,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:11,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:11,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:11,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:11,194 INFO L87 Difference]: Start difference. First operand 328 states and 418 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:11,346 INFO L93 Difference]: Finished difference Result 415 states and 516 transitions. [2022-12-13 13:26:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:26:11,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-12-13 13:26:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:11,348 INFO L225 Difference]: With dead ends: 415 [2022-12-13 13:26:11,348 INFO L226 Difference]: Without dead ends: 415 [2022-12-13 13:26:11,348 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 13:26:11,349 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 477 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:11,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 522 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-12-13 13:26:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 327. [2022-12-13 13:26:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 265 states have (on average 1.5245283018867926) internal successors, (404), 317 states have internal predecessors, (404), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:26:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 416 transitions. [2022-12-13 13:26:11,355 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 416 transitions. Word has length 34 [2022-12-13 13:26:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:11,356 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 416 transitions. [2022-12-13 13:26:11,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 416 transitions. [2022-12-13 13:26:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 13:26:11,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:11,356 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, 1] [2022-12-13 13:26:11,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 13:26:11,357 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:11,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048723, now seen corresponding path program 1 times [2022-12-13 13:26:11,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:11,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394405550] [2022-12-13 13:26:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:11,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:11,507 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 13:26:11,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:11,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394405550] [2022-12-13 13:26:11,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394405550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:11,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:11,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:26:11,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971625293] [2022-12-13 13:26:11,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:11,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:11,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:11,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:11,509 INFO L87 Difference]: Start difference. First operand 327 states and 416 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:11,634 INFO L93 Difference]: Finished difference Result 326 states and 414 transitions. [2022-12-13 13:26:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:26:11,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-12-13 13:26:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:11,635 INFO L225 Difference]: With dead ends: 326 [2022-12-13 13:26:11,635 INFO L226 Difference]: Without dead ends: 326 [2022-12-13 13:26:11,635 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 13:26:11,635 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 507 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:11,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 336 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-12-13 13:26:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-12-13 13:26:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 265 states have (on average 1.5169811320754718) internal successors, (402), 316 states have internal predecessors, (402), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:26:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 414 transitions. [2022-12-13 13:26:11,639 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 414 transitions. Word has length 34 [2022-12-13 13:26:11,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:11,639 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 414 transitions. [2022-12-13 13:26:11,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 414 transitions. [2022-12-13 13:26:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 13:26:11,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:11,639 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, 1, 1, 1] [2022-12-13 13:26:11,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 13:26:11,640 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972557, now seen corresponding path program 1 times [2022-12-13 13:26:11,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310235326] [2022-12-13 13:26:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:11,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:11,694 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 13:26:11,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:11,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310235326] [2022-12-13 13:26:11,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310235326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:11,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:11,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:26:11,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226773196] [2022-12-13 13:26:11,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:11,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:26:11,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:26:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:11,695 INFO L87 Difference]: Start difference. First operand 326 states and 414 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:11,855 INFO L93 Difference]: Finished difference Result 704 states and 864 transitions. [2022-12-13 13:26:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:26:11,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-12-13 13:26:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:11,859 INFO L225 Difference]: With dead ends: 704 [2022-12-13 13:26:11,859 INFO L226 Difference]: Without dead ends: 704 [2022-12-13 13:26:11,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:11,860 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 557 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:11,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 484 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-12-13 13:26:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 323. [2022-12-13 13:26:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 265 states have (on average 1.4943396226415093) internal successors, (396), 313 states have internal predecessors, (396), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:26:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 408 transitions. [2022-12-13 13:26:11,865 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 408 transitions. Word has length 36 [2022-12-13 13:26:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:11,865 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 408 transitions. [2022-12-13 13:26:11,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 408 transitions. [2022-12-13 13:26:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 13:26:11,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:11,865 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, 1, 1, 1] [2022-12-13 13:26:11,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 13:26:11,865 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:11,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972558, now seen corresponding path program 1 times [2022-12-13 13:26:11,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:11,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278259862] [2022-12-13 13:26:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:11,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:12,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:12,013 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 13:26:12,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:12,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278259862] [2022-12-13 13:26:12,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278259862] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:12,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:12,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:26:12,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002436372] [2022-12-13 13:26:12,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:12,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:12,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:12,015 INFO L87 Difference]: Start difference. First operand 323 states and 408 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:12,193 INFO L93 Difference]: Finished difference Result 526 states and 660 transitions. [2022-12-13 13:26:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:26:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-12-13 13:26:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:12,196 INFO L225 Difference]: With dead ends: 526 [2022-12-13 13:26:12,196 INFO L226 Difference]: Without dead ends: 526 [2022-12-13 13:26:12,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:26:12,197 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 733 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:12,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 468 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:12,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-12-13 13:26:12,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 322. [2022-12-13 13:26:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 265 states have (on average 1.4867924528301886) internal successors, (394), 312 states have internal predecessors, (394), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:26:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 406 transitions. [2022-12-13 13:26:12,202 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 406 transitions. Word has length 36 [2022-12-13 13:26:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:12,202 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 406 transitions. [2022-12-13 13:26:12,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 406 transitions. [2022-12-13 13:26:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 13:26:12,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:12,203 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, 1, 1, 1] [2022-12-13 13:26:12,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 13:26:12,203 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:12,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972719, now seen corresponding path program 1 times [2022-12-13 13:26:12,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:12,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406370091] [2022-12-13 13:26:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:12,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:12,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:12,373 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 13:26:12,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:12,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406370091] [2022-12-13 13:26:12,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406370091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:12,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:12,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:26:12,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319117824] [2022-12-13 13:26:12,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:12,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:26:12,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:26:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:12,375 INFO L87 Difference]: Start difference. First operand 322 states and 406 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:12,638 INFO L93 Difference]: Finished difference Result 466 states and 538 transitions. [2022-12-13 13:26:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:26:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-12-13 13:26:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:12,640 INFO L225 Difference]: With dead ends: 466 [2022-12-13 13:26:12,641 INFO L226 Difference]: Without dead ends: 466 [2022-12-13 13:26:12,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:12,641 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 364 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:12,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 452 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-12-13 13:26:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 322. [2022-12-13 13:26:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 265 states have (on average 1.4792452830188678) internal successors, (392), 312 states have internal predecessors, (392), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:26:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 404 transitions. [2022-12-13 13:26:12,648 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 404 transitions. Word has length 36 [2022-12-13 13:26:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:12,648 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 404 transitions. [2022-12-13 13:26:12,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 404 transitions. [2022-12-13 13:26:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 13:26:12,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:12,649 INFO L195 NwaCegarLoop]: trace histogram [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, 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 13:26:12,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 13:26:12,649 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -274270044, now seen corresponding path program 1 times [2022-12-13 13:26:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:12,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083144378] [2022-12-13 13:26:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:12,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:12,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:12,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 13:26:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:12,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:12,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083144378] [2022-12-13 13:26:12,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083144378] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:12,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308160216] [2022-12-13 13:26:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:12,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:12,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:12,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:12,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:26:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:12,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:26:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:12,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:26:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:12,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308160216] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:26:12,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:26:12,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 13:26:12,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556945841] [2022-12-13 13:26:12,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:26:12,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:26:12,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:26:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:26:12,925 INFO L87 Difference]: Start difference. First operand 322 states and 404 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 13:26:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:12,985 INFO L93 Difference]: Finished difference Result 1290 states and 1652 transitions. [2022-12-13 13:26:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:26:12,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2022-12-13 13:26:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:12,988 INFO L225 Difference]: With dead ends: 1290 [2022-12-13 13:26:12,988 INFO L226 Difference]: Without dead ends: 1290 [2022-12-13 13:26:12,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:26:12,989 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 766 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:12,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1032 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-12-13 13:26:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 721. [2022-12-13 13:26:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 658 states have (on average 1.452887537993921) internal successors, (956), 705 states have internal predecessors, (956), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 13:26:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 980 transitions. [2022-12-13 13:26:13,006 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 980 transitions. Word has length 50 [2022-12-13 13:26:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:13,006 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 980 transitions. [2022-12-13 13:26:13,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 13:26:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 980 transitions. [2022-12-13 13:26:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 13:26:13,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:13,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:13,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:26:13,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:13,207 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:13,208 INFO L85 PathProgramCache]: Analyzing trace with hash -975334622, now seen corresponding path program 1 times [2022-12-13 13:26:13,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:13,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413500562] [2022-12-13 13:26:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:13,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:13,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:13,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 13:26:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:13,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:13,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413500562] [2022-12-13 13:26:13,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413500562] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:13,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:13,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:26:13,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061374548] [2022-12-13 13:26:13,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:13,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:13,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:13,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:13,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:13,392 INFO L87 Difference]: Start difference. First operand 721 states and 980 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:13,569 INFO L93 Difference]: Finished difference Result 786 states and 1063 transitions. [2022-12-13 13:26:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:26:13,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-12-13 13:26:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:13,572 INFO L225 Difference]: With dead ends: 786 [2022-12-13 13:26:13,572 INFO L226 Difference]: Without dead ends: 786 [2022-12-13 13:26:13,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:26:13,572 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 356 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:13,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 347 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-12-13 13:26:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 718. [2022-12-13 13:26:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 658 states have (on average 1.4407294832826747) internal successors, (948), 702 states have internal predecessors, (948), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 13:26:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 972 transitions. [2022-12-13 13:26:13,581 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 972 transitions. Word has length 50 [2022-12-13 13:26:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:13,581 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 972 transitions. [2022-12-13 13:26:13,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 972 transitions. [2022-12-13 13:26:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 13:26:13,582 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:13,582 INFO L195 NwaCegarLoop]: trace histogram [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, 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 13:26:13,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 13:26:13,582 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1212801990, now seen corresponding path program 1 times [2022-12-13 13:26:13,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:13,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965812879] [2022-12-13 13:26:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:13,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:13,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965812879] [2022-12-13 13:26:13,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965812879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:13,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:13,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:26:13,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777254525] [2022-12-13 13:26:13,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:13,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:13,650 INFO L87 Difference]: Start difference. First operand 718 states and 972 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:13,668 INFO L93 Difference]: Finished difference Result 823 states and 1098 transitions. [2022-12-13 13:26:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 13:26:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:13,672 INFO L225 Difference]: With dead ends: 823 [2022-12-13 13:26:13,672 INFO L226 Difference]: Without dead ends: 823 [2022-12-13 13:26:13,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 13:26:13,673 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 119 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:13,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 400 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-12-13 13:26:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 724. [2022-12-13 13:26:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 664 states have (on average 1.4367469879518073) internal successors, (954), 708 states have internal predecessors, (954), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 13:26:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 978 transitions. [2022-12-13 13:26:13,687 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 978 transitions. Word has length 51 [2022-12-13 13:26:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:13,687 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 978 transitions. [2022-12-13 13:26:13,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 978 transitions. [2022-12-13 13:26:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 13:26:13,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:13,688 INFO L195 NwaCegarLoop]: trace histogram [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, 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 13:26:13,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 13:26:13,689 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:13,689 INFO L85 PathProgramCache]: Analyzing trace with hash 532743620, now seen corresponding path program 1 times [2022-12-13 13:26:13,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:13,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274160420] [2022-12-13 13:26:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:13,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:13,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:13,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:13,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274160420] [2022-12-13 13:26:13,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274160420] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:13,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671133301] [2022-12-13 13:26:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:13,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:13,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:13,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:13,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:26:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:13,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:26:13,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:13,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:26:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:13,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671133301] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:26:13,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:26:13,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-12-13 13:26:13,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776215434] [2022-12-13 13:26:13,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:26:13,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:26:13,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:13,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:26:13,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:26:13,967 INFO L87 Difference]: Start difference. First operand 724 states and 978 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 13:26:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:14,014 INFO L93 Difference]: Finished difference Result 2554 states and 3437 transitions. [2022-12-13 13:26:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:26:14,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2022-12-13 13:26:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:14,021 INFO L225 Difference]: With dead ends: 2554 [2022-12-13 13:26:14,021 INFO L226 Difference]: Without dead ends: 2554 [2022-12-13 13:26:14,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:26:14,022 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 370 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:14,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1257 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-12-13 13:26:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1753. [2022-12-13 13:26:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1674 states have (on average 1.4277180406212664) internal successors, (2390), 1718 states have internal predecessors, (2390), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-13 13:26:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2452 transitions. [2022-12-13 13:26:14,049 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2452 transitions. Word has length 51 [2022-12-13 13:26:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:14,049 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2452 transitions. [2022-12-13 13:26:14,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 13:26:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2452 transitions. [2022-12-13 13:26:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 13:26:14,050 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:14,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:14,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:26:14,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:14,251 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash 530896578, now seen corresponding path program 1 times [2022-12-13 13:26:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276926080] [2022-12-13 13:26:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:14,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:14,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276926080] [2022-12-13 13:26:14,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276926080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:14,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:14,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 13:26:14,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129037166] [2022-12-13 13:26:14,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:14,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:26:14,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:26:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:26:14,515 INFO L87 Difference]: Start difference. First operand 1753 states and 2452 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:14,816 INFO L93 Difference]: Finished difference Result 1771 states and 2470 transitions. [2022-12-13 13:26:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:26:14,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 13:26:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:14,820 INFO L225 Difference]: With dead ends: 1771 [2022-12-13 13:26:14,820 INFO L226 Difference]: Without dead ends: 1771 [2022-12-13 13:26:14,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:26:14,820 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 496 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:14,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 603 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-12-13 13:26:14,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1755. [2022-12-13 13:26:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1676 states have (on average 1.4278042959427208) internal successors, (2393), 1720 states have internal predecessors, (2393), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-13 13:26:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2455 transitions. [2022-12-13 13:26:14,838 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2455 transitions. Word has length 51 [2022-12-13 13:26:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:14,838 INFO L495 AbstractCegarLoop]: Abstraction has 1755 states and 2455 transitions. [2022-12-13 13:26:14,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2455 transitions. [2022-12-13 13:26:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 13:26:14,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:14,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:14,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-13 13:26:14,839 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 530896640, now seen corresponding path program 1 times [2022-12-13 13:26:14,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:14,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908353876] [2022-12-13 13:26:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:14,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:14,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:14,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:14,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908353876] [2022-12-13 13:26:14,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908353876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:14,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:14,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:26:14,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146740057] [2022-12-13 13:26:14,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:14,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:14,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:14,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:14,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:14,998 INFO L87 Difference]: Start difference. First operand 1755 states and 2455 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:15,136 INFO L93 Difference]: Finished difference Result 1770 states and 2468 transitions. [2022-12-13 13:26:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:26:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 13:26:15,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:15,139 INFO L225 Difference]: With dead ends: 1770 [2022-12-13 13:26:15,139 INFO L226 Difference]: Without dead ends: 1770 [2022-12-13 13:26:15,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:26:15,139 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 368 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:15,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 337 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-12-13 13:26:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1752. [2022-12-13 13:26:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1674 states have (on average 1.4265232974910393) internal successors, (2388), 1717 states have internal predecessors, (2388), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-13 13:26:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 2450 transitions. [2022-12-13 13:26:15,154 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 2450 transitions. Word has length 51 [2022-12-13 13:26:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:15,154 INFO L495 AbstractCegarLoop]: Abstraction has 1752 states and 2450 transitions. [2022-12-13 13:26:15,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 2450 transitions. [2022-12-13 13:26:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 13:26:15,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:15,155 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, 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 13:26:15,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-13 13:26:15,155 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:15,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:15,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1870600004, now seen corresponding path program 1 times [2022-12-13 13:26:15,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:15,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527397446] [2022-12-13 13:26:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:15,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:15,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:15,957 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 13:26:15,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:15,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527397446] [2022-12-13 13:26:15,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527397446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:15,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406850165] [2022-12-13 13:26:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:15,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:15,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:15,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:15,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:26:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 13:26:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:16,200 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 13:26:16,459 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 13:26:16,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:26:16,802 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 21 treesize of output 9 [2022-12-13 13:26:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:16,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:26:16,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406850165] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:16,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:26:16,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2022-12-13 13:26:16,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058441972] [2022-12-13 13:26:16,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:16,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:26:16,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:26:16,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-12-13 13:26:16,811 INFO L87 Difference]: Start difference. First operand 1752 states and 2450 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:17,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:17,551 INFO L93 Difference]: Finished difference Result 3630 states and 5125 transitions. [2022-12-13 13:26:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 13:26:17,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-12-13 13:26:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:17,557 INFO L225 Difference]: With dead ends: 3630 [2022-12-13 13:26:17,557 INFO L226 Difference]: Without dead ends: 3630 [2022-12-13 13:26:17,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 13:26:17,558 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 1071 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:17,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1072 Valid, 1004 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:26:17,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2022-12-13 13:26:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2332. [2022-12-13 13:26:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2230 states have (on average 1.4295964125560539) internal successors, (3188), 2290 states have internal predecessors, (3188), 54 states have call successors, (54), 5 states have call predecessors, (54), 5 states have return successors, (54), 36 states have call predecessors, (54), 54 states have call successors, (54) [2022-12-13 13:26:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3296 transitions. [2022-12-13 13:26:17,584 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3296 transitions. Word has length 54 [2022-12-13 13:26:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:17,584 INFO L495 AbstractCegarLoop]: Abstraction has 2332 states and 3296 transitions. [2022-12-13 13:26:17,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3296 transitions. [2022-12-13 13:26:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 13:26:17,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:17,585 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, 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 13:26:17,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:26:17,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 13:26:17,786 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1870600005, now seen corresponding path program 1 times [2022-12-13 13:26:17,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:17,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854362299] [2022-12-13 13:26:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:17,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:18,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:18,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854362299] [2022-12-13 13:26:18,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854362299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:18,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:18,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 13:26:18,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158742840] [2022-12-13 13:26:18,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:18,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:26:18,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:18,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:26:18,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:26:18,712 INFO L87 Difference]: Start difference. First operand 2332 states and 3296 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:19,106 INFO L93 Difference]: Finished difference Result 2370 states and 3332 transitions. [2022-12-13 13:26:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:26:19,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-12-13 13:26:19,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:19,112 INFO L225 Difference]: With dead ends: 2370 [2022-12-13 13:26:19,112 INFO L226 Difference]: Without dead ends: 2370 [2022-12-13 13:26:19,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-12-13 13:26:19,113 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 109 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:19,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 805 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-12-13 13:26:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2359. [2022-12-13 13:26:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2258 states have (on average 1.4238263950398582) internal successors, (3215), 2317 states have internal predecessors, (3215), 53 states have call successors, (53), 5 states have call predecessors, (53), 5 states have return successors, (53), 36 states have call predecessors, (53), 53 states have call successors, (53) [2022-12-13 13:26:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 3321 transitions. [2022-12-13 13:26:19,139 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 3321 transitions. Word has length 54 [2022-12-13 13:26:19,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:19,139 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 3321 transitions. [2022-12-13 13:26:19,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 3321 transitions. [2022-12-13 13:26:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 13:26:19,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:19,140 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, 1, 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 13:26:19,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-13 13:26:19,140 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:19,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:19,141 INFO L85 PathProgramCache]: Analyzing trace with hash 652010731, now seen corresponding path program 1 times [2022-12-13 13:26:19,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:19,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337739468] [2022-12-13 13:26:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:19,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:19,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:19,745 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 13:26:19,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:19,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337739468] [2022-12-13 13:26:19,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337739468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:19,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557653344] [2022-12-13 13:26:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:19,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:19,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:19,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:19,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:26:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 13:26:19,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:19,886 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:26:19,887 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 13:26:20,018 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 15 treesize of output 11 [2022-12-13 13:26:20,026 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 15 treesize of output 11 [2022-12-13 13:26:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:26:20,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 13:26:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:26:20,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 13:26:20,131 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 13:26:20,137 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 13:26:20,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 13:26:20,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 13:26:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:20,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:26:20,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557653344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:20,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:26:20,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 25 [2022-12-13 13:26:20,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825667004] [2022-12-13 13:26:20,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:20,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:26:20,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:26:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:26:20,264 INFO L87 Difference]: Start difference. First operand 2359 states and 3321 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:20,843 INFO L93 Difference]: Finished difference Result 2951 states and 4065 transitions. [2022-12-13 13:26:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:26:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-12-13 13:26:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:20,849 INFO L225 Difference]: With dead ends: 2951 [2022-12-13 13:26:20,849 INFO L226 Difference]: Without dead ends: 2951 [2022-12-13 13:26:20,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 13:26:20,850 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 477 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:20,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1390 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 13:26:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2022-12-13 13:26:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2414. [2022-12-13 13:26:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2313 states have (on average 1.4124513618677044) internal successors, (3267), 2372 states have internal predecessors, (3267), 53 states have call successors, (53), 5 states have call predecessors, (53), 5 states have return successors, (53), 36 states have call predecessors, (53), 53 states have call successors, (53) [2022-12-13 13:26:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3373 transitions. [2022-12-13 13:26:20,879 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3373 transitions. Word has length 55 [2022-12-13 13:26:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:20,879 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 3373 transitions. [2022-12-13 13:26:20,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3373 transitions. [2022-12-13 13:26:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 13:26:20,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:20,880 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, 1, 1, 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 13:26:20,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:26:21,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 13:26:21,082 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash 528923948, now seen corresponding path program 1 times [2022-12-13 13:26:21,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:21,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303087446] [2022-12-13 13:26:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:21,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:21,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:21,715 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 13:26:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303087446] [2022-12-13 13:26:21,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303087446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591609980] [2022-12-13 13:26:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:21,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:21,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:21,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:21,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:26:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 13:26:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:21,867 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 13:26:22,061 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 15 treesize of output 11 [2022-12-13 13:26:22,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:26:22,094 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 29 treesize of output 28 [2022-12-13 13:26:22,176 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 9 [2022-12-13 13:26:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:22,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:26:22,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591609980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:22,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:26:22,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2022-12-13 13:26:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956131794] [2022-12-13 13:26:22,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:26:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:26:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:26:22,180 INFO L87 Difference]: Start difference. First operand 2414 states and 3373 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:22,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:22,789 INFO L93 Difference]: Finished difference Result 3568 states and 5041 transitions. [2022-12-13 13:26:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 13:26:22,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-12-13 13:26:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:22,793 INFO L225 Difference]: With dead ends: 3568 [2022-12-13 13:26:22,797 INFO L226 Difference]: Without dead ends: 3568 [2022-12-13 13:26:22,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 13:26:22,799 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1057 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:22,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 1080 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:26:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-12-13 13:26:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 2596. [2022-12-13 13:26:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2481 states have (on average 1.4079000403063282) internal successors, (3493), 2550 states have internal predecessors, (3493), 66 states have call successors, (66), 6 states have call predecessors, (66), 6 states have return successors, (66), 39 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-13 13:26:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 3625 transitions. [2022-12-13 13:26:22,821 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 3625 transitions. Word has length 56 [2022-12-13 13:26:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:22,821 INFO L495 AbstractCegarLoop]: Abstraction has 2596 states and 3625 transitions. [2022-12-13 13:26:22,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 3625 transitions. [2022-12-13 13:26:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 13:26:22,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:22,822 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, 1, 1, 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 13:26:22,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 13:26:23,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 13:26:23,023 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash 528923949, now seen corresponding path program 1 times [2022-12-13 13:26:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:23,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997706692] [2022-12-13 13:26:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:23,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:23,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:23,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997706692] [2022-12-13 13:26:23,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997706692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:23,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:23,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 13:26:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037599290] [2022-12-13 13:26:23,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:23,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:26:23,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:26:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:26:23,865 INFO L87 Difference]: Start difference. First operand 2596 states and 3625 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:25,148 INFO L93 Difference]: Finished difference Result 3590 states and 5092 transitions. [2022-12-13 13:26:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 13:26:25,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-12-13 13:26:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:25,154 INFO L225 Difference]: With dead ends: 3590 [2022-12-13 13:26:25,154 INFO L226 Difference]: Without dead ends: 3590 [2022-12-13 13:26:25,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2022-12-13 13:26:25,154 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1554 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:25,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1555 Valid, 1134 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:26:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2022-12-13 13:26:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2836. [2022-12-13 13:26:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2705 states have (on average 1.4181146025878004) internal successors, (3836), 2783 states have internal predecessors, (3836), 80 states have call successors, (80), 8 states have call predecessors, (80), 8 states have return successors, (80), 44 states have call predecessors, (80), 80 states have call successors, (80) [2022-12-13 13:26:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 3996 transitions. [2022-12-13 13:26:25,178 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 3996 transitions. Word has length 56 [2022-12-13 13:26:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:25,178 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 3996 transitions. [2022-12-13 13:26:25,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 3996 transitions. [2022-12-13 13:26:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 13:26:25,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:25,179 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, 1, 1, 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 13:26:25,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-12-13 13:26:25,179 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:25,179 INFO L85 PathProgramCache]: Analyzing trace with hash 530770990, now seen corresponding path program 1 times [2022-12-13 13:26:25,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:25,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243799165] [2022-12-13 13:26:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:25,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:25,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:25,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243799165] [2022-12-13 13:26:25,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243799165] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:25,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:25,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 13:26:25,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051105509] [2022-12-13 13:26:25,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:25,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:26:25,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:26:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:26:25,478 INFO L87 Difference]: Start difference. First operand 2836 states and 3996 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:26,017 INFO L93 Difference]: Finished difference Result 4223 states and 6020 transitions. [2022-12-13 13:26:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 13:26:26,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-12-13 13:26:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:26,023 INFO L225 Difference]: With dead ends: 4223 [2022-12-13 13:26:26,023 INFO L226 Difference]: Without dead ends: 4223 [2022-12-13 13:26:26,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-12-13 13:26:26,023 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1082 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:26,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 1115 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:26:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2022-12-13 13:26:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 3266. [2022-12-13 13:26:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3087 states have (on average 1.4039520570132815) internal successors, (4334), 3199 states have internal predecessors, (4334), 124 states have call successors, (124), 12 states have call predecessors, (124), 12 states have return successors, (124), 54 states have call predecessors, (124), 124 states have call successors, (124) [2022-12-13 13:26:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4582 transitions. [2022-12-13 13:26:26,053 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4582 transitions. Word has length 56 [2022-12-13 13:26:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:26,053 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4582 transitions. [2022-12-13 13:26:26,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4582 transitions. [2022-12-13 13:26:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 13:26:26,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:26,054 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, 1, 1, 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 13:26:26,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-12-13 13:26:26,054 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:26,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:26,054 INFO L85 PathProgramCache]: Analyzing trace with hash 530770991, now seen corresponding path program 1 times [2022-12-13 13:26:26,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:26,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543561406] [2022-12-13 13:26:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:26,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:26,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:26,562 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 13:26:26,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:26,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543561406] [2022-12-13 13:26:26,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543561406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:26,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490965054] [2022-12-13 13:26:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:26,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:26,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:26,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:26,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:26:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 13:26:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:26,701 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 13:26:27,100 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 15 treesize of output 11 [2022-12-13 13:26:27,105 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 15 treesize of output 11 [2022-12-13 13:26:27,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:26:27,424 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 38 treesize of output 14 [2022-12-13 13:26:27,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:26:27,431 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 9 [2022-12-13 13:26:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:27,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:26:27,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490965054] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:27,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:26:27,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 21 [2022-12-13 13:26:27,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238142619] [2022-12-13 13:26:27,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:27,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:26:27,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:27,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:26:27,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-12-13 13:26:27,490 INFO L87 Difference]: Start difference. First operand 3266 states and 4582 transitions. Second operand has 13 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:28,344 INFO L93 Difference]: Finished difference Result 4397 states and 6247 transitions. [2022-12-13 13:26:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:26:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-12-13 13:26:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:28,349 INFO L225 Difference]: With dead ends: 4397 [2022-12-13 13:26:28,349 INFO L226 Difference]: Without dead ends: 4397 [2022-12-13 13:26:28,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-12-13 13:26:28,350 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1629 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:28,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 947 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:26:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2022-12-13 13:26:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3405. [2022-12-13 13:26:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3405 states, 3220 states have (on average 1.4142857142857144) internal successors, (4554), 3334 states have internal predecessors, (4554), 129 states have call successors, (129), 13 states have call predecessors, (129), 13 states have return successors, (129), 57 states have call predecessors, (129), 129 states have call successors, (129) [2022-12-13 13:26:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 4812 transitions. [2022-12-13 13:26:28,380 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 4812 transitions. Word has length 56 [2022-12-13 13:26:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:28,381 INFO L495 AbstractCegarLoop]: Abstraction has 3405 states and 4812 transitions. [2022-12-13 13:26:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 4812 transitions. [2022-12-13 13:26:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 13:26:28,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:28,381 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, 1, 1, 1, 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 13:26:28,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:26:28,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 13:26:28,582 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash -958362120, now seen corresponding path program 1 times [2022-12-13 13:26:28,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:28,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641723753] [2022-12-13 13:26:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:28,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:28,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 13:26:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:26:28,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641723753] [2022-12-13 13:26:28,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641723753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:28,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:28,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:26:28,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941072388] [2022-12-13 13:26:28,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:28,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:26:28,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:26:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:28,663 INFO L87 Difference]: Start difference. First operand 3405 states and 4812 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 13:26:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:28,695 INFO L93 Difference]: Finished difference Result 4603 states and 6415 transitions. [2022-12-13 13:26:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:26:28,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-12-13 13:26:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:28,701 INFO L225 Difference]: With dead ends: 4603 [2022-12-13 13:26:28,702 INFO L226 Difference]: Without dead ends: 4603 [2022-12-13 13:26:28,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:26:28,702 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 415 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:28,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 343 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4603 states. [2022-12-13 13:26:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4603 to 3404. [2022-12-13 13:26:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 3220 states have (on average 1.4086956521739131) internal successors, (4536), 3333 states have internal predecessors, (4536), 129 states have call successors, (129), 13 states have call predecessors, (129), 13 states have return successors, (129), 57 states have call predecessors, (129), 129 states have call successors, (129) [2022-12-13 13:26:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 4794 transitions. [2022-12-13 13:26:28,738 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 4794 transitions. Word has length 57 [2022-12-13 13:26:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:28,738 INFO L495 AbstractCegarLoop]: Abstraction has 3404 states and 4794 transitions. [2022-12-13 13:26:28,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 13:26:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 4794 transitions. [2022-12-13 13:26:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 13:26:28,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:28,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:28,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-12-13 13:26:28,739 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354176, now seen corresponding path program 1 times [2022-12-13 13:26:28,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:28,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648947157] [2022-12-13 13:26:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:28,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:29,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:29,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 13:26:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:29,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:29,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648947157] [2022-12-13 13:26:29,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648947157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:29,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477797424] [2022-12-13 13:26:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:29,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:29,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:29,486 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:29,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:26:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 13:26:29,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:29,653 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 13:26:29,930 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 15 treesize of output 11 [2022-12-13 13:26:29,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:26:29,980 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 29 treesize of output 28 [2022-12-13 13:26:30,110 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-12-13 13:26:30,111 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 21 treesize of output 29 [2022-12-13 13:26:30,166 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 9 [2022-12-13 13:26:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:30,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:26:30,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477797424] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:30,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:26:30,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 27 [2022-12-13 13:26:30,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432807675] [2022-12-13 13:26:30,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:26:30,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 13:26:30,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:30,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 13:26:30,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-12-13 13:26:30,255 INFO L87 Difference]: Start difference. First operand 3404 states and 4794 transitions. Second operand has 28 states, 27 states have (on average 3.814814814814815) internal successors, (103), 24 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:26:32,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:32,203 INFO L93 Difference]: Finished difference Result 7018 states and 10107 transitions. [2022-12-13 13:26:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 13:26:32,203 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.814814814814815) internal successors, (103), 24 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-12-13 13:26:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:32,211 INFO L225 Difference]: With dead ends: 7018 [2022-12-13 13:26:32,211 INFO L226 Difference]: Without dead ends: 7018 [2022-12-13 13:26:32,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=906, Invalid=3254, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 13:26:32,212 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 3604 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3605 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:32,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3605 Valid, 2106 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 13:26:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7018 states. [2022-12-13 13:26:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7018 to 3574. [2022-12-13 13:26:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3574 states, 3390 states have (on average 1.4041297935103245) internal successors, (4760), 3486 states have internal predecessors, (4760), 129 states have call successors, (129), 13 states have call predecessors, (129), 13 states have return successors, (129), 74 states have call predecessors, (129), 129 states have call successors, (129) [2022-12-13 13:26:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 5018 transitions. [2022-12-13 13:26:32,258 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 5018 transitions. Word has length 57 [2022-12-13 13:26:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:32,258 INFO L495 AbstractCegarLoop]: Abstraction has 3574 states and 5018 transitions. [2022-12-13 13:26:32,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.814814814814815) internal successors, (103), 24 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:26:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 5018 transitions. [2022-12-13 13:26:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 13:26:32,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:32,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:32,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:26:32,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 13:26:32,459 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354177, now seen corresponding path program 1 times [2022-12-13 13:26:32,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:32,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519592104] [2022-12-13 13:26:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:32,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:33,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:33,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 13:26:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:26:33,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:33,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519592104] [2022-12-13 13:26:33,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519592104] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:33,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916273370] [2022-12-13 13:26:33,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:33,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:33,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:33,736 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:33,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:26:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:33,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-13 13:26:33,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:33,868 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 13:26:33,871 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 13:26:34,173 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 15 treesize of output 11 [2022-12-13 13:26:34,180 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 15 treesize of output 11 [2022-12-13 13:26:34,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:26:34,245 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 42 treesize of output 33 [2022-12-13 13:26:34,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:26:34,253 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 42 treesize of output 33 [2022-12-13 13:26:34,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:26:34,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 13:26:34,421 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 13:26:34,421 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 15 treesize of output 15 [2022-12-13 13:26:34,519 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 32 treesize of output 14 [2022-12-13 13:26:34,523 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 9 [2022-12-13 13:26:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:34,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:26:40,780 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:26:42,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916273370] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:42,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:26:42,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 31 [2022-12-13 13:26:42,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439032156] [2022-12-13 13:26:42,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:26:42,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 13:26:42,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:42,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 13:26:42,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 13:26:42,883 INFO L87 Difference]: Start difference. First operand 3574 states and 5018 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:26:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:46,615 INFO L93 Difference]: Finished difference Result 6825 states and 9670 transitions. [2022-12-13 13:26:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 13:26:46,615 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-12-13 13:26:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:46,622 INFO L225 Difference]: With dead ends: 6825 [2022-12-13 13:26:46,622 INFO L226 Difference]: Without dead ends: 6825 [2022-12-13 13:26:46,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=725, Invalid=3697, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 13:26:46,623 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 3800 mSDsluCounter, 3454 mSDsCounter, 0 mSdLazyCounter, 3507 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 3623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:46,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 3584 Invalid, 3623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3507 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-13 13:26:46,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6825 states. [2022-12-13 13:26:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 3743. [2022-12-13 13:26:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3545 states have (on average 1.3932299012693936) internal successors, (4939), 3651 states have internal predecessors, (4939), 142 states have call successors, (142), 14 states have call predecessors, (142), 14 states have return successors, (142), 77 states have call predecessors, (142), 142 states have call successors, (142) [2022-12-13 13:26:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 5223 transitions. [2022-12-13 13:26:46,661 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 5223 transitions. Word has length 57 [2022-12-13 13:26:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:46,662 INFO L495 AbstractCegarLoop]: Abstraction has 3743 states and 5223 transitions. [2022-12-13 13:26:46,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:26:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 5223 transitions. [2022-12-13 13:26:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 13:26:46,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:46,662 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, 1, 1, 1, 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 13:26:46,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:26:46,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:46,863 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash -783228031, now seen corresponding path program 1 times [2022-12-13 13:26:46,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:46,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740066689] [2022-12-13 13:26:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:46,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:46,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:46,914 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 13:26:46,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:46,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740066689] [2022-12-13 13:26:46,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740066689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:46,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26861030] [2022-12-13 13:26:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:46,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:46,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:46,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:46,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:26:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:47,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:26:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:47,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:26:47,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26861030] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:47,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:26:47,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-12-13 13:26:47,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278248138] [2022-12-13 13:26:47,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:47,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:47,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:47,067 INFO L87 Difference]: Start difference. First operand 3743 states and 5223 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:47,090 INFO L93 Difference]: Finished difference Result 4963 states and 6937 transitions. [2022-12-13 13:26:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:47,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-12-13 13:26:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:47,096 INFO L225 Difference]: With dead ends: 4963 [2022-12-13 13:26:47,096 INFO L226 Difference]: Without dead ends: 4963 [2022-12-13 13:26:47,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 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 13:26:47,097 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 327 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:47,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 361 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4963 states. [2022-12-13 13:26:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4963 to 4587. [2022-12-13 13:26:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4361 states have (on average 1.403118550791103) internal successors, (6119), 4467 states have internal predecessors, (6119), 170 states have call successors, (170), 14 states have call predecessors, (170), 14 states have return successors, (170), 105 states have call predecessors, (170), 170 states have call successors, (170) [2022-12-13 13:26:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 6459 transitions. [2022-12-13 13:26:47,150 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 6459 transitions. Word has length 57 [2022-12-13 13:26:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:47,150 INFO L495 AbstractCegarLoop]: Abstraction has 4587 states and 6459 transitions. [2022-12-13 13:26:47,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 6459 transitions. [2022-12-13 13:26:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 13:26:47,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:47,150 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, 1, 1, 1, 1, 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 13:26:47,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 13:26:47,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:47,351 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash 355545581, now seen corresponding path program 1 times [2022-12-13 13:26:47,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:47,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444911203] [2022-12-13 13:26:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:47,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:47,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:47,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 13:26:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:47,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:47,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444911203] [2022-12-13 13:26:47,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444911203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:47,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:47,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 13:26:47,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175716707] [2022-12-13 13:26:47,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:47,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:26:47,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:26:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:26:47,963 INFO L87 Difference]: Start difference. First operand 4587 states and 6459 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:49,193 INFO L93 Difference]: Finished difference Result 8870 states and 12529 transitions. [2022-12-13 13:26:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 13:26:49,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-12-13 13:26:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:49,205 INFO L225 Difference]: With dead ends: 8870 [2022-12-13 13:26:49,205 INFO L226 Difference]: Without dead ends: 8859 [2022-12-13 13:26:49,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 13:26:49,206 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 2203 mSDsluCounter, 2122 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:49,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2203 Valid, 2375 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 13:26:49,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8859 states. [2022-12-13 13:26:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8859 to 4541. [2022-12-13 13:26:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4541 states, 4315 states have (on average 1.3972190034762457) internal successors, (6029), 4421 states have internal predecessors, (6029), 170 states have call successors, (170), 14 states have call predecessors, (170), 14 states have return successors, (170), 105 states have call predecessors, (170), 170 states have call successors, (170) [2022-12-13 13:26:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 6369 transitions. [2022-12-13 13:26:49,257 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 6369 transitions. Word has length 58 [2022-12-13 13:26:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:49,257 INFO L495 AbstractCegarLoop]: Abstraction has 4541 states and 6369 transitions. [2022-12-13 13:26:49,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 6369 transitions. [2022-12-13 13:26:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 13:26:49,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:49,259 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, 1, 1, 1, 1, 1, 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 13:26:49,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-12-13 13:26:49,259 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:49,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:49,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1061403003, now seen corresponding path program 1 times [2022-12-13 13:26:49,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:49,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556215152] [2022-12-13 13:26:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:49,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:49,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:49,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:49,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556215152] [2022-12-13 13:26:49,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556215152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:49,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:49,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-13 13:26:49,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829610305] [2022-12-13 13:26:49,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:49,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:26:49,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:49,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:26:49,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:26:49,972 INFO L87 Difference]: Start difference. First operand 4541 states and 6369 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:51,259 INFO L93 Difference]: Finished difference Result 7004 states and 9926 transitions. [2022-12-13 13:26:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 13:26:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-12-13 13:26:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:51,267 INFO L225 Difference]: With dead ends: 7004 [2022-12-13 13:26:51,267 INFO L226 Difference]: Without dead ends: 7004 [2022-12-13 13:26:51,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 13:26:51,268 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 2236 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2239 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:51,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2239 Valid, 1768 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:26:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7004 states. [2022-12-13 13:26:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7004 to 5420. [2022-12-13 13:26:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5420 states, 5141 states have (on average 1.4094534137327368) internal successors, (7246), 5275 states have internal predecessors, (7246), 218 states have call successors, (218), 19 states have call predecessors, (218), 19 states have return successors, (218), 125 states have call predecessors, (218), 218 states have call successors, (218) [2022-12-13 13:26:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5420 states to 5420 states and 7682 transitions. [2022-12-13 13:26:51,317 INFO L78 Accepts]: Start accepts. Automaton has 5420 states and 7682 transitions. Word has length 59 [2022-12-13 13:26:51,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:51,317 INFO L495 AbstractCegarLoop]: Abstraction has 5420 states and 7682 transitions. [2022-12-13 13:26:51,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:51,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5420 states and 7682 transitions. [2022-12-13 13:26:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 13:26:51,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:51,318 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, 1, 1, 1, 1, 1, 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 13:26:51,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-12-13 13:26:51,318 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:51,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1870749629, now seen corresponding path program 1 times [2022-12-13 13:26:51,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:51,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143291745] [2022-12-13 13:26:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:51,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:51,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:51,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:51,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143291745] [2022-12-13 13:26:51,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143291745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:51,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:51,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 13:26:51,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921979220] [2022-12-13 13:26:51,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:51,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 13:26:51,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:51,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 13:26:51,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:26:51,619 INFO L87 Difference]: Start difference. First operand 5420 states and 7682 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:52,008 INFO L93 Difference]: Finished difference Result 6651 states and 9488 transitions. [2022-12-13 13:26:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:26:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-12-13 13:26:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:52,021 INFO L225 Difference]: With dead ends: 6651 [2022-12-13 13:26:52,021 INFO L226 Difference]: Without dead ends: 6651 [2022-12-13 13:26:52,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-12-13 13:26:52,021 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 1074 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:52,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 874 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:26:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2022-12-13 13:26:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 5649. [2022-12-13 13:26:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5649 states, 5364 states have (on average 1.419463087248322) internal successors, (7614), 5500 states have internal predecessors, (7614), 223 states have call successors, (223), 20 states have call predecessors, (223), 20 states have return successors, (223), 128 states have call predecessors, (223), 223 states have call successors, (223) [2022-12-13 13:26:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5649 states to 5649 states and 8060 transitions. [2022-12-13 13:26:52,093 INFO L78 Accepts]: Start accepts. Automaton has 5649 states and 8060 transitions. Word has length 59 [2022-12-13 13:26:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:52,093 INFO L495 AbstractCegarLoop]: Abstraction has 5649 states and 8060 transitions. [2022-12-13 13:26:52,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 5649 states and 8060 transitions. [2022-12-13 13:26:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 13:26:52,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:52,094 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, 1, 1, 1, 1, 1, 1, 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 13:26:52,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-12-13 13:26:52,094 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1910438407, now seen corresponding path program 1 times [2022-12-13 13:26:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:52,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499023863] [2022-12-13 13:26:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:52,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:52,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 13:26:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:26:52,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499023863] [2022-12-13 13:26:52,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499023863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:52,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:52,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:26:52,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795516240] [2022-12-13 13:26:52,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:52,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:26:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:26:52,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:26:52,270 INFO L87 Difference]: Start difference. First operand 5649 states and 8060 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:52,457 INFO L93 Difference]: Finished difference Result 5733 states and 8040 transitions. [2022-12-13 13:26:52,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:26:52,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-12-13 13:26:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:52,463 INFO L225 Difference]: With dead ends: 5733 [2022-12-13 13:26:52,463 INFO L226 Difference]: Without dead ends: 5733 [2022-12-13 13:26:52,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:26:52,463 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 433 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:52,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 443 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2022-12-13 13:26:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 5647. [2022-12-13 13:26:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5647 states, 5364 states have (on average 1.3933631618195377) internal successors, (7474), 5498 states have internal predecessors, (7474), 223 states have call successors, (223), 20 states have call predecessors, (223), 20 states have return successors, (223), 128 states have call predecessors, (223), 223 states have call successors, (223) [2022-12-13 13:26:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5647 states to 5647 states and 7920 transitions. [2022-12-13 13:26:52,507 INFO L78 Accepts]: Start accepts. Automaton has 5647 states and 7920 transitions. Word has length 60 [2022-12-13 13:26:52,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:52,507 INFO L495 AbstractCegarLoop]: Abstraction has 5647 states and 7920 transitions. [2022-12-13 13:26:52,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5647 states and 7920 transitions. [2022-12-13 13:26:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 13:26:52,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:52,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:52,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-12-13 13:26:52,508 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:52,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1346211993, now seen corresponding path program 1 times [2022-12-13 13:26:52,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:52,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069872237] [2022-12-13 13:26:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:52,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:52,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:52,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 13:26:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:26:52,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:52,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069872237] [2022-12-13 13:26:52,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069872237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:52,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:52,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:26:52,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003484248] [2022-12-13 13:26:52,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:52,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:26:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:26:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:26:52,540 INFO L87 Difference]: Start difference. First operand 5647 states and 7920 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:52,556 INFO L93 Difference]: Finished difference Result 5647 states and 7882 transitions. [2022-12-13 13:26:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:26:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-12-13 13:26:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:52,575 INFO L225 Difference]: With dead ends: 5647 [2022-12-13 13:26:52,575 INFO L226 Difference]: Without dead ends: 5647 [2022-12-13 13:26:52,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 13:26:52,576 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:52,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5647 states. [2022-12-13 13:26:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5647 to 5647. [2022-12-13 13:26:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5647 states, 5364 states have (on average 1.3862788963460104) internal successors, (7436), 5498 states have internal predecessors, (7436), 223 states have call successors, (223), 20 states have call predecessors, (223), 20 states have return successors, (223), 128 states have call predecessors, (223), 223 states have call successors, (223) [2022-12-13 13:26:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5647 states to 5647 states and 7882 transitions. [2022-12-13 13:26:52,617 INFO L78 Accepts]: Start accepts. Automaton has 5647 states and 7882 transitions. Word has length 60 [2022-12-13 13:26:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:52,617 INFO L495 AbstractCegarLoop]: Abstraction has 5647 states and 7882 transitions. [2022-12-13 13:26:52,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 5647 states and 7882 transitions. [2022-12-13 13:26:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-13 13:26:52,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:52,618 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 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 13:26:52,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-12-13 13:26:52,618 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:52,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:52,618 INFO L85 PathProgramCache]: Analyzing trace with hash -707292911, now seen corresponding path program 1 times [2022-12-13 13:26:52,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:52,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323273260] [2022-12-13 13:26:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:52,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:52,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:52,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:52,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323273260] [2022-12-13 13:26:52,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323273260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:52,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164056567] [2022-12-13 13:26:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:52,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:52,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:52,670 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:52,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:26:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:52,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:26:52,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:52,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:26:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:52,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164056567] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:26:52,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:26:52,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-12-13 13:26:52,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973145820] [2022-12-13 13:26:52,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:26:52,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:26:52,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:52,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:26:52,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:52,878 INFO L87 Difference]: Start difference. First operand 5647 states and 7882 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:52,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:52,917 INFO L93 Difference]: Finished difference Result 11401 states and 15894 transitions. [2022-12-13 13:26:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:26:52,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-12-13 13:26:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:52,931 INFO L225 Difference]: With dead ends: 11401 [2022-12-13 13:26:52,931 INFO L226 Difference]: Without dead ends: 11401 [2022-12-13 13:26:52,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:26:52,931 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 354 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:52,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 909 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11401 states. [2022-12-13 13:26:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11401 to 8713. [2022-12-13 13:26:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8713 states, 8318 states have (on average 1.3904784804039432) internal successors, (11566), 8477 states have internal predecessors, (11566), 335 states have call successors, (335), 20 states have call predecessors, (335), 20 states have return successors, (335), 215 states have call predecessors, (335), 335 states have call successors, (335) [2022-12-13 13:26:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8713 states to 8713 states and 12236 transitions. [2022-12-13 13:26:53,028 INFO L78 Accepts]: Start accepts. Automaton has 8713 states and 12236 transitions. Word has length 62 [2022-12-13 13:26:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:53,028 INFO L495 AbstractCegarLoop]: Abstraction has 8713 states and 12236 transitions. [2022-12-13 13:26:53,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:26:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8713 states and 12236 transitions. [2022-12-13 13:26:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 13:26:53,028 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:53,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:53,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 13:26:53,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:53,229 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash 940111791, now seen corresponding path program 1 times [2022-12-13 13:26:53,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:53,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094520091] [2022-12-13 13:26:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:53,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:53,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 13:26:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 13:26:53,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:53,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094520091] [2022-12-13 13:26:53,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094520091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:53,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:53,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:26:53,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755119074] [2022-12-13 13:26:53,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:53,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:26:53,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:53,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:26:53,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:53,317 INFO L87 Difference]: Start difference. First operand 8713 states and 12236 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:53,356 INFO L93 Difference]: Finished difference Result 15276 states and 21694 transitions. [2022-12-13 13:26:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:26:53,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-12-13 13:26:53,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:53,373 INFO L225 Difference]: With dead ends: 15276 [2022-12-13 13:26:53,373 INFO L226 Difference]: Without dead ends: 15276 [2022-12-13 13:26:53,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:26:53,373 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 281 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:53,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 763 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:26:53,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15276 states. [2022-12-13 13:26:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15276 to 8769. [2022-12-13 13:26:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8769 states, 8374 states have (on average 1.389061380463339) internal successors, (11632), 8533 states have internal predecessors, (11632), 335 states have call successors, (335), 20 states have call predecessors, (335), 20 states have return successors, (335), 215 states have call predecessors, (335), 335 states have call successors, (335) [2022-12-13 13:26:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8769 states to 8769 states and 12302 transitions. [2022-12-13 13:26:53,477 INFO L78 Accepts]: Start accepts. Automaton has 8769 states and 12302 transitions. Word has length 63 [2022-12-13 13:26:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:53,477 INFO L495 AbstractCegarLoop]: Abstraction has 8769 states and 12302 transitions. [2022-12-13 13:26:53,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 8769 states and 12302 transitions. [2022-12-13 13:26:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 13:26:53,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:53,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:53,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-12-13 13:26:53,479 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash 940111853, now seen corresponding path program 1 times [2022-12-13 13:26:53,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:53,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487986880] [2022-12-13 13:26:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:53,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:53,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:53,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 13:26:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:26:53,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:53,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487986880] [2022-12-13 13:26:53,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487986880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:53,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:53,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:26:53,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856884585] [2022-12-13 13:26:53,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:53,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:53,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:53,551 INFO L87 Difference]: Start difference. First operand 8769 states and 12302 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:53,742 INFO L93 Difference]: Finished difference Result 9389 states and 13365 transitions. [2022-12-13 13:26:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:26:53,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-12-13 13:26:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:53,751 INFO L225 Difference]: With dead ends: 9389 [2022-12-13 13:26:53,751 INFO L226 Difference]: Without dead ends: 9389 [2022-12-13 13:26:53,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 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 13:26:53,752 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 142 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:53,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 619 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2022-12-13 13:26:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 8769. [2022-12-13 13:26:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8769 states, 8374 states have (on average 1.3863147838547887) internal successors, (11609), 8533 states have internal predecessors, (11609), 335 states have call successors, (335), 20 states have call predecessors, (335), 20 states have return successors, (335), 215 states have call predecessors, (335), 335 states have call successors, (335) [2022-12-13 13:26:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8769 states to 8769 states and 12279 transitions. [2022-12-13 13:26:53,838 INFO L78 Accepts]: Start accepts. Automaton has 8769 states and 12279 transitions. Word has length 63 [2022-12-13 13:26:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:53,838 INFO L495 AbstractCegarLoop]: Abstraction has 8769 states and 12279 transitions. [2022-12-13 13:26:53,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 8769 states and 12279 transitions. [2022-12-13 13:26:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 13:26:53,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:53,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:26:53,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-12-13 13:26:53,839 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:53,839 INFO L85 PathProgramCache]: Analyzing trace with hash 940111854, now seen corresponding path program 1 times [2022-12-13 13:26:53,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:53,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536674977] [2022-12-13 13:26:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:53,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:53,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:53,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 13:26:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:26:53,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536674977] [2022-12-13 13:26:53,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536674977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:26:53,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:26:53,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:26:53,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644181344] [2022-12-13 13:26:53,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:26:53,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:26:53,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:26:53,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:26:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:26:53,969 INFO L87 Difference]: Start difference. First operand 8769 states and 12279 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:26:54,185 INFO L93 Difference]: Finished difference Result 8765 states and 12083 transitions. [2022-12-13 13:26:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:26:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-12-13 13:26:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:26:54,196 INFO L225 Difference]: With dead ends: 8765 [2022-12-13 13:26:54,196 INFO L226 Difference]: Without dead ends: 8765 [2022-12-13 13:26:54,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:26:54,197 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 146 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:26:54,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 594 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:26:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8765 states. [2022-12-13 13:26:54,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8765 to 8765. [2022-12-13 13:26:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 8374 states have (on average 1.3629090040601863) internal successors, (11413), 8529 states have internal predecessors, (11413), 335 states have call successors, (335), 20 states have call predecessors, (335), 20 states have return successors, (335), 215 states have call predecessors, (335), 335 states have call successors, (335) [2022-12-13 13:26:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 12083 transitions. [2022-12-13 13:26:54,282 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 12083 transitions. Word has length 63 [2022-12-13 13:26:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:26:54,283 INFO L495 AbstractCegarLoop]: Abstraction has 8765 states and 12083 transitions. [2022-12-13 13:26:54,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:26:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 12083 transitions. [2022-12-13 13:26:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 13:26:54,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:26:54,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:54,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-12-13 13:26:54,284 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:26:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:26:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash -451244996, now seen corresponding path program 1 times [2022-12-13 13:26:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:26:54,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450292376] [2022-12-13 13:26:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:54,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:26:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:54,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:26:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:54,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:26:54,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450292376] [2022-12-13 13:26:54,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450292376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:26:54,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230652443] [2022-12-13 13:26:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:26:54,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:26:54,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:26:54,724 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:26:54,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 13:26:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:26:54,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 13:26:54,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:26:55,245 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 15 treesize of output 11 [2022-12-13 13:26:55,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:26:55,296 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 43 treesize of output 34 [2022-12-13 13:26:55,402 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 33 treesize of output 15 [2022-12-13 13:26:55,417 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 13 treesize of output 9 [2022-12-13 13:26:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:26:55,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:26:55,486 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1524 Int)) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1524)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-12-13 13:26:55,500 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 270 treesize of output 254 [2022-12-13 13:28:02,270 WARN L233 SmtUtils]: Spent 1.11m on a formula simplification. DAG size of input: 62 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:28:32,455 WARN L233 SmtUtils]: Spent 28.09s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:29:04,585 WARN L233 SmtUtils]: Spent 28.08s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:29:38,733 WARN L233 SmtUtils]: Spent 28.05s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:29:39,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230652443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:29:39,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:29:39,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2022-12-13 13:29:39,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109012562] [2022-12-13 13:29:39,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:29:39,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 13:29:39,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:29:39,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 13:29:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=804, Unknown=7, NotChecked=58, Total=992 [2022-12-13 13:29:39,144 INFO L87 Difference]: Start difference. First operand 8765 states and 12083 transitions. Second operand has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:29:40,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:29:40,243 INFO L93 Difference]: Finished difference Result 9021 states and 12417 transitions. [2022-12-13 13:29:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:29:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-12-13 13:29:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:29:40,251 INFO L225 Difference]: With dead ends: 9021 [2022-12-13 13:29:40,251 INFO L226 Difference]: Without dead ends: 9010 [2022-12-13 13:29:40,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 163.5s TimeCoverageRelationStatistics Valid=311, Invalid=1168, Unknown=7, NotChecked=74, Total=1560 [2022-12-13 13:29:40,251 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 940 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:29:40,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 1637 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 13:29:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2022-12-13 13:29:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 8793. [2022-12-13 13:29:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8402 states have (on average 1.362532730302309) internal successors, (11448), 8557 states have internal predecessors, (11448), 335 states have call successors, (335), 20 states have call predecessors, (335), 20 states have return successors, (335), 215 states have call predecessors, (335), 335 states have call successors, (335) [2022-12-13 13:29:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 12118 transitions. [2022-12-13 13:29:40,323 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 12118 transitions. Word has length 63 [2022-12-13 13:29:40,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:29:40,323 INFO L495 AbstractCegarLoop]: Abstraction has 8793 states and 12118 transitions. [2022-12-13 13:29:40,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:29:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 12118 transitions. [2022-12-13 13:29:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 13:29:40,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:29:40,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:40,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 13:29:40,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 13:29:40,526 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:29:40,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:29:40,527 INFO L85 PathProgramCache]: Analyzing trace with hash -193079558, now seen corresponding path program 1 times [2022-12-13 13:29:40,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:29:40,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850628443] [2022-12-13 13:29:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:29:40,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:29:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:29:40,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 13:29:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:29:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:29:40,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:29:40,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850628443] [2022-12-13 13:29:40,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850628443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:29:40,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599340221] [2022-12-13 13:29:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:29:40,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:29:40,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:29:40,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:29:40,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 13:29:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:29:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 13:29:41,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:29:41,443 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 15 treesize of output 11 [2022-12-13 13:29:41,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:29:41,686 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 39 treesize of output 15 [2022-12-13 13:29:41,707 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 13 treesize of output 9 [2022-12-13 13:29:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:29:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:29:41,790 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 46 treesize of output 38 [2022-12-13 13:30:56,326 WARN L233 SmtUtils]: Spent 1.07m on a formula simplification. DAG size of input: 29 DAG size of output: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:31:26,432 WARN L233 SmtUtils]: Spent 30.05s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:32:00,607 WARN L233 SmtUtils]: Spent 32.09s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:32:27,547 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-12-13 13:32:27,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-12-13 13:32:27,548 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-12-13 13:32:27,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 13:32:27,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 13:32:27,751 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:306) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 53 more [2022-12-13 13:32:27,761 INFO L158 Benchmark]: Toolchain (without parser) took 385946.09ms. Allocated memory was 151.0MB in the beginning and 383.8MB in the end (delta: 232.8MB). Free memory was 118.2MB in the beginning and 252.7MB in the end (delta: -134.5MB). Peak memory consumption was 102.0MB. Max. memory is 16.1GB. [2022-12-13 13:32:27,761 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 151.0MB. Free memory was 125.5MB in the beginning and 125.5MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:32:27,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.34ms. Allocated memory is still 151.0MB. Free memory was 118.2MB in the beginning and 95.9MB in the end (delta: 22.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-12-13 13:32:27,761 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.01ms. Allocated memory is still 151.0MB. Free memory was 95.9MB in the beginning and 93.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:32:27,762 INFO L158 Benchmark]: Boogie Preprocessor took 33.25ms. Allocated memory is still 151.0MB. Free memory was 93.2MB in the beginning and 91.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:32:27,762 INFO L158 Benchmark]: RCFGBuilder took 570.35ms. Allocated memory is still 151.0MB. Free memory was 90.5MB in the beginning and 59.6MB in the end (delta: 30.8MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2022-12-13 13:32:27,762 INFO L158 Benchmark]: TraceAbstraction took 384890.34ms. Allocated memory was 151.0MB in the beginning and 383.8MB in the end (delta: 232.8MB). Free memory was 59.0MB in the beginning and 252.7MB in the end (delta: -193.7MB). Peak memory consumption was 43.3MB. Max. memory is 16.1GB. [2022-12-13 13:32:27,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 151.0MB. Free memory was 125.5MB in the beginning and 125.5MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.34ms. Allocated memory is still 151.0MB. Free memory was 118.2MB in the beginning and 95.9MB in the end (delta: 22.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.01ms. Allocated memory is still 151.0MB. Free memory was 95.9MB in the beginning and 93.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.25ms. Allocated memory is still 151.0MB. Free memory was 93.2MB in the beginning and 91.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 570.35ms. Allocated memory is still 151.0MB. Free memory was 90.5MB in the beginning and 59.6MB in the end (delta: 30.8MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * TraceAbstraction took 384890.34ms. Allocated memory was 151.0MB in the beginning and 383.8MB in the end (delta: 232.8MB). Free memory was 59.0MB in the beginning and 252.7MB in the end (delta: -193.7MB). Peak memory consumption was 43.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/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_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/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 e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- 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 13:32:29,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:32:29,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:32:29,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:32:29,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:32:29,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:32:29,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:32:29,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:32:29,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:32:29,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:32:29,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:32:29,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:32:29,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:32:29,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:32:29,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:32:29,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:32:29,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:32:29,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:32:29,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:32:29,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:32:29,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:32:29,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:32:29,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:32:29,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:32:29,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:32:29,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:32:29,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:32:29,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:32:29,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:32:29,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:32:29,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:32:29,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:32:29,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:32:29,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:32:29,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:32:29,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:32:29,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:32:29,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:32:29,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:32:29,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:32:29,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:32:29,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 13:32:29,190 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:32:29,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:32:29,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:32:29,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:32:29,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:32:29,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:32:29,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:32:29,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:32:29,192 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:32:29,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:32:29,193 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:32:29,193 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:32:29,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:32:29,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:32:29,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:32:29,194 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:32:29,194 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:32:29,194 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:32:29,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:32:29,194 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:32:29,195 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 13:32:29,195 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 13:32:29,195 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:32:29,195 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:32:29,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:32:29,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:32:29,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:32:29,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:32:29,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:32:29,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:32:29,197 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 13:32:29,197 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 13:32:29,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:32:29,197 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:32:29,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:32:29,197 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 13:32:29,198 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:32:29,198 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_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2022-12-13 13:32:29,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:32:29,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:32:29,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:32:29,448 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:32:29,448 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:32:29,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-12-13 13:32:32,000 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:32:32,179 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:32:32,180 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-12-13 13:32:32,190 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/data/9807be862/890931dd85724bc1b2c20b7dff4a5bdb/FLAGd7cd30886 [2022-12-13 13:32:32,204 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/data/9807be862/890931dd85724bc1b2c20b7dff4a5bdb [2022-12-13 13:32:32,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:32:32,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:32:32,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:32:32,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:32:32,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:32:32,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a72bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32, skipping insertion in model container [2022-12-13 13:32:32,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:32:32,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:32:32,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:32:32,584 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:32:32,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:32:32,685 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:32:32,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32 WrapperNode [2022-12-13 13:32:32,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:32:32,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:32:32,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:32:32,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:32:32,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,723 INFO L138 Inliner]: procedures = 182, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 228 [2022-12-13 13:32:32,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:32:32,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:32:32,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:32:32,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:32:32,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,746 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:32:32,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:32:32,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:32:32,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:32:32,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (1/1) ... [2022-12-13 13:32:32,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:32:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:32:32,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:32:32,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:32:32,809 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-12-13 13:32:32,809 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-12-13 13:32:32,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:32:32,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:32:32,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 13:32:32,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 13:32:32,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-12-13 13:32:32,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:32:32,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 13:32:32,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 13:32:32,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:32:32,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:32:32,910 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:32:32,912 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:32:33,508 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:32:33,514 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:32:33,514 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 13:32:33,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:32:33 BoogieIcfgContainer [2022-12-13 13:32:33,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:32:33,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:32:33,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:32:33,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:32:33,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:32:32" (1/3) ... [2022-12-13 13:32:33,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0d3827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:32:33, skipping insertion in model container [2022-12-13 13:32:33,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:32:32" (2/3) ... [2022-12-13 13:32:33,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0d3827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:32:33, skipping insertion in model container [2022-12-13 13:32:33,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:32:33" (3/3) ... [2022-12-13 13:32:33,523 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2022-12-13 13:32:33,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:32:33,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-12-13 13:32:33,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:32:33,578 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;@a75d8a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:32:33,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-12-13 13:32:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 93 states have (on average 2.0) internal successors, (186), 160 states have internal predecessors, (186), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:32:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 13:32:33,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:33,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:32:33,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:33,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1045027658, now seen corresponding path program 1 times [2022-12-13 13:32:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:33,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63666112] [2022-12-13 13:32:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:33,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:33,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:33,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:33,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 13:32:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 13:32:33,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:33,684 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 13:32:33,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:33,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:33,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63666112] [2022-12-13 13:32:33,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63666112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:33,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:33,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:33,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287752903] [2022-12-13 13:32:33,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:33,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:32:33,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:33,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:32:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:32:33,728 INFO L87 Difference]: Start difference. First operand has 164 states, 93 states have (on average 2.0) internal successors, (186), 160 states have internal predecessors, (186), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:32:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:33,751 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2022-12-13 13:32:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:32:33,753 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 13:32:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:33,760 INFO L225 Difference]: With dead ends: 164 [2022-12-13 13:32:33,760 INFO L226 Difference]: Without dead ends: 162 [2022-12-13 13:32:33,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:32:33,764 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:33,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:32:33,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-12-13 13:32:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-12-13 13:32:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 92 states have (on average 1.923913043478261) internal successors, (177), 158 states have internal predecessors, (177), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:32:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2022-12-13 13:32:33,799 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 6 [2022-12-13 13:32:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:33,800 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2022-12-13 13:32:33,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:32:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2022-12-13 13:32:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 13:32:33,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:33,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:32:33,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:32:34,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:34,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1037788445, now seen corresponding path program 1 times [2022-12-13 13:32:34,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:34,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114320791] [2022-12-13 13:32:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:34,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:34,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:34,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:34,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 13:32:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:32:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:34,146 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 13:32:34,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:34,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:34,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114320791] [2022-12-13 13:32:34,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114320791] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:34,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:34,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:32:34,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695330746] [2022-12-13 13:32:34,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:34,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:32:34,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:34,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:32:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:32:34,149 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:32:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:34,497 INFO L93 Difference]: Finished difference Result 315 states and 352 transitions. [2022-12-13 13:32:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:32:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 13:32:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:34,500 INFO L225 Difference]: With dead ends: 315 [2022-12-13 13:32:34,500 INFO L226 Difference]: Without dead ends: 315 [2022-12-13 13:32:34,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 13:32:34,501 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 163 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:34,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 231 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 13:32:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-12-13 13:32:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 223. [2022-12-13 13:32:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.9066666666666667) internal successors, (286), 216 states have internal predecessors, (286), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:32:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 294 transitions. [2022-12-13 13:32:34,514 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 294 transitions. Word has length 6 [2022-12-13 13:32:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:34,515 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 294 transitions. [2022-12-13 13:32:34,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:32:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 294 transitions. [2022-12-13 13:32:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 13:32:34,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:34,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:32:34,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 13:32:34,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:34,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1037788446, now seen corresponding path program 1 times [2022-12-13 13:32:34,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:34,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435757289] [2022-12-13 13:32:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:34,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:34,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:34,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 13:32:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:32:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:34,953 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 13:32:34,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:34,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435757289] [2022-12-13 13:32:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435757289] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:34,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848422366] [2022-12-13 13:32:34,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:34,956 INFO L87 Difference]: Start difference. First operand 223 states and 294 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:32:35,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:35,382 INFO L93 Difference]: Finished difference Result 358 states and 452 transitions. [2022-12-13 13:32:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:32:35,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 13:32:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:35,384 INFO L225 Difference]: With dead ends: 358 [2022-12-13 13:32:35,384 INFO L226 Difference]: Without dead ends: 358 [2022-12-13 13:32:35,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:35,385 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 116 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:35,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 392 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-12-13 13:32:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 292. [2022-12-13 13:32:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 213 states have (on average 1.8732394366197183) internal successors, (399), 281 states have internal predecessors, (399), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:32:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 415 transitions. [2022-12-13 13:32:35,402 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 415 transitions. Word has length 6 [2022-12-13 13:32:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:35,402 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 415 transitions. [2022-12-13 13:32:35,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:32:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 415 transitions. [2022-12-13 13:32:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 13:32:35,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:35,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:32:35,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 13:32:35,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:35,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:35,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1037788508, now seen corresponding path program 1 times [2022-12-13 13:32:35,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:35,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119873487] [2022-12-13 13:32:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:35,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:35,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:35,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:35,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 13:32:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:35,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:32:35,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:35,772 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 13:32:35,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:35,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119873487] [2022-12-13 13:32:35,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119873487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:35,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:35,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:35,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800798160] [2022-12-13 13:32:35,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:35,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:35,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:35,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:35,775 INFO L87 Difference]: Start difference. First operand 292 states and 415 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:32:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:36,221 INFO L93 Difference]: Finished difference Result 357 states and 450 transitions. [2022-12-13 13:32:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:32:36,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 13:32:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:36,223 INFO L225 Difference]: With dead ends: 357 [2022-12-13 13:32:36,223 INFO L226 Difference]: Without dead ends: 357 [2022-12-13 13:32:36,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:36,225 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 115 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:36,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 407 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-12-13 13:32:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 292. [2022-12-13 13:32:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 213 states have (on average 1.8732394366197183) internal successors, (399), 281 states have internal predecessors, (399), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:32:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 415 transitions. [2022-12-13 13:32:36,240 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 415 transitions. Word has length 6 [2022-12-13 13:32:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:36,240 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 415 transitions. [2022-12-13 13:32:36,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 13:32:36,241 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 415 transitions. [2022-12-13 13:32:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 13:32:36,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:36,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:36,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 13:32:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:36,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1581206003, now seen corresponding path program 1 times [2022-12-13 13:32:36,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:36,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063643525] [2022-12-13 13:32:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:36,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:36,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:36,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:36,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 13:32:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:36,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 13:32:36,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:36,516 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 13:32:36,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:36,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:36,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063643525] [2022-12-13 13:32:36,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063643525] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:36,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:36,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:32:36,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719730909] [2022-12-13 13:32:36,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:36,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:32:36,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:36,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:32:36,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:32:36,517 INFO L87 Difference]: Start difference. First operand 292 states and 415 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:32:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:36,537 INFO L93 Difference]: Finished difference Result 433 states and 571 transitions. [2022-12-13 13:32:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:32:36,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 13:32:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:36,539 INFO L225 Difference]: With dead ends: 433 [2022-12-13 13:32:36,539 INFO L226 Difference]: Without dead ends: 433 [2022-12-13 13:32:36,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 13:32:36,540 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 154 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:36,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 354 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:32:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-12-13 13:32:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 294. [2022-12-13 13:32:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 215 states have (on average 1.8558139534883722) internal successors, (399), 283 states have internal predecessors, (399), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:32:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 415 transitions. [2022-12-13 13:32:36,551 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 415 transitions. Word has length 9 [2022-12-13 13:32:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:36,551 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 415 transitions. [2022-12-13 13:32:36,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:32:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 415 transitions. [2022-12-13 13:32:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 13:32:36,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:36,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:36,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 13:32:36,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:36,753 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:36,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:36,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2060710840, now seen corresponding path program 1 times [2022-12-13 13:32:36,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:36,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683795570] [2022-12-13 13:32:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:36,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:36,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:36,761 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:36,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 13:32:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:36,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:32:36,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:36,947 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 13:32:36,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:36,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:36,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683795570] [2022-12-13 13:32:36,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683795570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:36,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:36,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:36,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019859828] [2022-12-13 13:32:36,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:36,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:36,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:36,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:36,950 INFO L87 Difference]: Start difference. First operand 294 states and 415 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:37,406 INFO L93 Difference]: Finished difference Result 510 states and 639 transitions. [2022-12-13 13:32:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:32:37,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-13 13:32:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:37,409 INFO L225 Difference]: With dead ends: 510 [2022-12-13 13:32:37,409 INFO L226 Difference]: Without dead ends: 510 [2022-12-13 13:32:37,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 13:32:37,409 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 313 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:37,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 404 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-12-13 13:32:37,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 300. [2022-12-13 13:32:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 221 states have (on average 1.832579185520362) internal successors, (405), 289 states have internal predecessors, (405), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:32:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 421 transitions. [2022-12-13 13:32:37,416 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 421 transitions. Word has length 11 [2022-12-13 13:32:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:37,416 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 421 transitions. [2022-12-13 13:32:37,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 421 transitions. [2022-12-13 13:32:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 13:32:37,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:37,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:37,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-12-13 13:32:37,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:37,618 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2060710841, now seen corresponding path program 1 times [2022-12-13 13:32:37,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:37,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253124504] [2022-12-13 13:32:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:37,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:37,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:37,621 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:37,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 13:32:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:37,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:32:37,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:37,757 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 13:32:37,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:37,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:37,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253124504] [2022-12-13 13:32:37,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253124504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:37,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:37,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:37,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818809755] [2022-12-13 13:32:37,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:37,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:37,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:37,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:37,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:37,759 INFO L87 Difference]: Start difference. First operand 300 states and 421 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:38,200 INFO L93 Difference]: Finished difference Result 348 states and 440 transitions. [2022-12-13 13:32:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:32:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-13 13:32:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:38,202 INFO L225 Difference]: With dead ends: 348 [2022-12-13 13:32:38,202 INFO L226 Difference]: Without dead ends: 348 [2022-12-13 13:32:38,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 13:32:38,203 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 159 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:38,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 406 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-12-13 13:32:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 300. [2022-12-13 13:32:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 221 states have (on average 1.8054298642533937) internal successors, (399), 289 states have internal predecessors, (399), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:32:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 415 transitions. [2022-12-13 13:32:38,208 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 415 transitions. Word has length 11 [2022-12-13 13:32:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:38,208 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 415 transitions. [2022-12-13 13:32:38,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 415 transitions. [2022-12-13 13:32:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 13:32:38,209 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:38,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:38,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 13:32:38,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:38,410 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1772744581, now seen corresponding path program 1 times [2022-12-13 13:32:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:38,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199110466] [2022-12-13 13:32:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:38,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:38,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:38,412 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:38,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 13:32:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:38,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 13:32:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:38,453 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 13:32:38,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:38,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199110466] [2022-12-13 13:32:38,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199110466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:38,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:38,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:38,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630716672] [2022-12-13 13:32:38,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:38,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:32:38,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:38,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:32:38,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:32:38,455 INFO L87 Difference]: Start difference. First operand 300 states and 415 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:32:38,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:38,637 INFO L93 Difference]: Finished difference Result 342 states and 456 transitions. [2022-12-13 13:32:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:32:38,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 13:32:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:38,640 INFO L225 Difference]: With dead ends: 342 [2022-12-13 13:32:38,640 INFO L226 Difference]: Without dead ends: 335 [2022-12-13 13:32:38,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 13:32:38,641 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 58 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:38,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 272 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:32:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-12-13 13:32:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 297. [2022-12-13 13:32:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 218 states have (on average 1.8073394495412844) internal successors, (394), 286 states have internal predecessors, (394), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:32:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 410 transitions. [2022-12-13 13:32:38,646 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 410 transitions. Word has length 10 [2022-12-13 13:32:38,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:38,646 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 410 transitions. [2022-12-13 13:32:38,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:32:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 410 transitions. [2022-12-13 13:32:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 13:32:38,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:38,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:38,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 13:32:38,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:38,848 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:38,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1130227961, now seen corresponding path program 1 times [2022-12-13 13:32:38,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:38,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861155307] [2022-12-13 13:32:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:38,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:38,854 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:38,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 13:32:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 13:32:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:39,039 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 13:32:39,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:32:39,081 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 13:32:39,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:39,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:39,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861155307] [2022-12-13 13:32:39,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861155307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:39,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:39,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:39,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062373634] [2022-12-13 13:32:39,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:39,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:39,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:39,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:39,083 INFO L87 Difference]: Start difference. First operand 297 states and 410 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:39,692 INFO L93 Difference]: Finished difference Result 535 states and 651 transitions. [2022-12-13 13:32:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:32:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-13 13:32:39,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:39,694 INFO L225 Difference]: With dead ends: 535 [2022-12-13 13:32:39,694 INFO L226 Difference]: Without dead ends: 535 [2022-12-13 13:32:39,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 13:32:39,695 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 389 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:39,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 400 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 13:32:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-12-13 13:32:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 318. [2022-12-13 13:32:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 239 states have (on average 1.8242677824267783) internal successors, (436), 307 states have internal predecessors, (436), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:32:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 452 transitions. [2022-12-13 13:32:39,706 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 452 transitions. Word has length 14 [2022-12-13 13:32:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:39,706 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 452 transitions. [2022-12-13 13:32:39,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 452 transitions. [2022-12-13 13:32:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 13:32:39,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:39,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:39,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 13:32:39,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:39,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:39,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:39,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1130227962, now seen corresponding path program 1 times [2022-12-13 13:32:39,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:39,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923820081] [2022-12-13 13:32:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:39,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:39,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:39,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:39,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 13:32:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:40,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:32:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:40,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:32:40,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:32:40,254 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 13:32:40,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:40,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:40,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923820081] [2022-12-13 13:32:40,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923820081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:40,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:40,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:32:40,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049418666] [2022-12-13 13:32:40,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:40,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:32:40,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:40,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:32:40,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:32:40,256 INFO L87 Difference]: Start difference. First operand 318 states and 452 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:41,469 INFO L93 Difference]: Finished difference Result 620 states and 747 transitions. [2022-12-13 13:32:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:32:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-13 13:32:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:41,471 INFO L225 Difference]: With dead ends: 620 [2022-12-13 13:32:41,471 INFO L226 Difference]: Without dead ends: 620 [2022-12-13 13:32:41,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:32:41,471 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 477 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:41,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 601 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 13:32:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-12-13 13:32:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 318. [2022-12-13 13:32:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 239 states have (on average 1.8033472803347281) internal successors, (431), 307 states have internal predecessors, (431), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 13:32:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 447 transitions. [2022-12-13 13:32:41,477 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 447 transitions. Word has length 14 [2022-12-13 13:32:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:41,477 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 447 transitions. [2022-12-13 13:32:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 447 transitions. [2022-12-13 13:32:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 13:32:41,478 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:41,478 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 13:32:41,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-13 13:32:41,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:41,681 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:41,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1374628220, now seen corresponding path program 1 times [2022-12-13 13:32:41,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:41,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937118868] [2022-12-13 13:32:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:41,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:41,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:41,686 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:41,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 13:32:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:41,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 13:32:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:42,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:32:42,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-12-13 13:32:42,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:32:42,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:32:42,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2022-12-13 13:32:42,087 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 13:32:42,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:42,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:42,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937118868] [2022-12-13 13:32:42,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937118868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:42,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:42,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:32:42,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849146017] [2022-12-13 13:32:42,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:42,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:32:42,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:32:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:32:42,089 INFO L87 Difference]: Start difference. First operand 318 states and 447 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:43,293 INFO L93 Difference]: Finished difference Result 678 states and 940 transitions. [2022-12-13 13:32:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:32:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-13 13:32:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:43,295 INFO L225 Difference]: With dead ends: 678 [2022-12-13 13:32:43,295 INFO L226 Difference]: Without dead ends: 678 [2022-12-13 13:32:43,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:32:43,295 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 410 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:43,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 1526 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 13:32:43,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-12-13 13:32:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 346. [2022-12-13 13:32:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 264 states have (on average 1.7916666666666667) internal successors, (473), 333 states have internal predecessors, (473), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 493 transitions. [2022-12-13 13:32:43,302 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 493 transitions. Word has length 17 [2022-12-13 13:32:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:43,302 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 493 transitions. [2022-12-13 13:32:43,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 493 transitions. [2022-12-13 13:32:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 13:32:43,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:43,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:43,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 13:32:43,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:43,503 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash 535434815, now seen corresponding path program 1 times [2022-12-13 13:32:43,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:43,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229145259] [2022-12-13 13:32:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:43,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:43,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:43,505 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:43,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 13:32:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:43,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:32:43,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:43,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:32:43,675 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 17 treesize of output 7 [2022-12-13 13:32:43,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:32:43,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:32:43,682 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 17 treesize of output 10 [2022-12-13 13:32:43,703 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 13:32:43,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:43,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229145259] [2022-12-13 13:32:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229145259] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:43,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:43,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:32:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276173359] [2022-12-13 13:32:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:32:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:32:43,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:32:43,705 INFO L87 Difference]: Start difference. First operand 346 states and 493 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:44,235 INFO L93 Difference]: Finished difference Result 417 states and 557 transitions. [2022-12-13 13:32:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:32:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-12-13 13:32:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:44,237 INFO L225 Difference]: With dead ends: 417 [2022-12-13 13:32:44,237 INFO L226 Difference]: Without dead ends: 417 [2022-12-13 13:32:44,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:32:44,237 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 122 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:44,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 871 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-12-13 13:32:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 367. [2022-12-13 13:32:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 285 states have (on average 1.7543859649122806) internal successors, (500), 352 states have internal predecessors, (500), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 520 transitions. [2022-12-13 13:32:44,243 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 520 transitions. Word has length 18 [2022-12-13 13:32:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:44,243 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 520 transitions. [2022-12-13 13:32:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 520 transitions. [2022-12-13 13:32:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 13:32:44,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:44,244 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 13:32:44,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 13:32:44,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:44,445 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1824566489, now seen corresponding path program 1 times [2022-12-13 13:32:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85916229] [2022-12-13 13:32:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:44,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:44,447 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:44,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 13:32:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:44,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:32:44,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:44,564 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 13:32:44,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:44,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:44,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85916229] [2022-12-13 13:32:44,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85916229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:44,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:44,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922546853] [2022-12-13 13:32:44,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:44,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:44,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:44,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:44,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:44,566 INFO L87 Difference]: Start difference. First operand 367 states and 520 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:45,070 INFO L93 Difference]: Finished difference Result 597 states and 769 transitions. [2022-12-13 13:32:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:32:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-12-13 13:32:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:45,072 INFO L225 Difference]: With dead ends: 597 [2022-12-13 13:32:45,072 INFO L226 Difference]: Without dead ends: 597 [2022-12-13 13:32:45,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 13:32:45,073 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 295 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:45,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 428 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:32:45,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-12-13 13:32:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 387. [2022-12-13 13:32:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 305 states have (on average 1.7704918032786885) internal successors, (540), 372 states have internal predecessors, (540), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 560 transitions. [2022-12-13 13:32:45,081 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 560 transitions. Word has length 19 [2022-12-13 13:32:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:45,081 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 560 transitions. [2022-12-13 13:32:45,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 560 transitions. [2022-12-13 13:32:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 13:32:45,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:45,082 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 13:32:45,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-13 13:32:45,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:45,284 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:45,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1824566488, now seen corresponding path program 1 times [2022-12-13 13:32:45,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:45,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246390373] [2022-12-13 13:32:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:45,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:45,289 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:45,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 13:32:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:32:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:45,508 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 13:32:45,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:45,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:45,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246390373] [2022-12-13 13:32:45,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246390373] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:45,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:45,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:45,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35097086] [2022-12-13 13:32:45,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:45,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:45,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:45,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:45,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:45,510 INFO L87 Difference]: Start difference. First operand 387 states and 560 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:45,907 INFO L93 Difference]: Finished difference Result 423 states and 566 transitions. [2022-12-13 13:32:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:32:45,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-12-13 13:32:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:45,909 INFO L225 Difference]: With dead ends: 423 [2022-12-13 13:32:45,909 INFO L226 Difference]: Without dead ends: 423 [2022-12-13 13:32:45,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 13:32:45,910 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 145 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:45,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 404 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-12-13 13:32:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 387. [2022-12-13 13:32:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 305 states have (on average 1.740983606557377) internal successors, (531), 372 states have internal predecessors, (531), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 551 transitions. [2022-12-13 13:32:45,915 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 551 transitions. Word has length 19 [2022-12-13 13:32:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:45,915 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 551 transitions. [2022-12-13 13:32:45,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 551 transitions. [2022-12-13 13:32:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 13:32:45,916 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:45,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:45,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 13:32:46,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:46,117 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:46,117 INFO L85 PathProgramCache]: Analyzing trace with hash -834523210, now seen corresponding path program 1 times [2022-12-13 13:32:46,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:46,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989274855] [2022-12-13 13:32:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:46,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:46,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:46,118 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:46,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 13:32:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:46,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:32:46,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:46,167 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 7 [2022-12-13 13:32:46,185 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 13:32:46,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:46,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:46,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989274855] [2022-12-13 13:32:46,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989274855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:46,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:46,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:46,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843077731] [2022-12-13 13:32:46,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:46,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:32:46,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:46,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:32:46,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:32:46,186 INFO L87 Difference]: Start difference. First operand 387 states and 551 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:46,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:46,366 INFO L93 Difference]: Finished difference Result 468 states and 636 transitions. [2022-12-13 13:32:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:32:46,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-12-13 13:32:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:46,368 INFO L225 Difference]: With dead ends: 468 [2022-12-13 13:32:46,368 INFO L226 Difference]: Without dead ends: 468 [2022-12-13 13:32:46,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 13:32:46,369 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 148 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:46,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 257 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:32:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-12-13 13:32:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 384. [2022-12-13 13:32:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 305 states have (on average 1.7114754098360656) internal successors, (522), 369 states have internal predecessors, (522), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 542 transitions. [2022-12-13 13:32:46,374 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 542 transitions. Word has length 20 [2022-12-13 13:32:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:46,374 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 542 transitions. [2022-12-13 13:32:46,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 542 transitions. [2022-12-13 13:32:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 13:32:46,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:46,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:46,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 13:32:46,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:46,575 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:46,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:46,576 INFO L85 PathProgramCache]: Analyzing trace with hash -834523209, now seen corresponding path program 1 times [2022-12-13 13:32:46,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:46,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428828743] [2022-12-13 13:32:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:46,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:46,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:46,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:46,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 13:32:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:32:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:46,657 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 13:32:46,711 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 13:32:46,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:46,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428828743] [2022-12-13 13:32:46,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428828743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:46,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:46,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:32:46,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354210923] [2022-12-13 13:32:46,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:46,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:46,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:46,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:46,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:46,713 INFO L87 Difference]: Start difference. First operand 384 states and 542 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:47,215 INFO L93 Difference]: Finished difference Result 658 states and 876 transitions. [2022-12-13 13:32:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:32:47,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-12-13 13:32:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:47,217 INFO L225 Difference]: With dead ends: 658 [2022-12-13 13:32:47,217 INFO L226 Difference]: Without dead ends: 658 [2022-12-13 13:32:47,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:47,217 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 319 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:47,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 443 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:32:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-12-13 13:32:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 433. [2022-12-13 13:32:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 355 states have (on average 1.6929577464788732) internal successors, (601), 418 states have internal predecessors, (601), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 621 transitions. [2022-12-13 13:32:47,223 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 621 transitions. Word has length 20 [2022-12-13 13:32:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:47,223 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 621 transitions. [2022-12-13 13:32:47,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 621 transitions. [2022-12-13 13:32:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 13:32:47,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:47,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:47,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 13:32:47,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:47,424 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:47,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash -692943719, now seen corresponding path program 1 times [2022-12-13 13:32:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:47,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477671656] [2022-12-13 13:32:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:47,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:47,426 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:47,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 13:32:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:32:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:47,495 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 13:32:47,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:47,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:47,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477671656] [2022-12-13 13:32:47,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477671656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:47,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:47,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:32:47,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635100140] [2022-12-13 13:32:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:47,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:32:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:32:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:32:47,497 INFO L87 Difference]: Start difference. First operand 433 states and 621 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:47,600 INFO L93 Difference]: Finished difference Result 406 states and 527 transitions. [2022-12-13 13:32:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:32:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-12-13 13:32:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:47,601 INFO L225 Difference]: With dead ends: 406 [2022-12-13 13:32:47,601 INFO L226 Difference]: Without dead ends: 406 [2022-12-13 13:32:47,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:32:47,602 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 232 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:47,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 954 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:32:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-12-13 13:32:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 378. [2022-12-13 13:32:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 301 states have (on average 1.6744186046511629) internal successors, (504), 363 states have internal predecessors, (504), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 524 transitions. [2022-12-13 13:32:47,606 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 524 transitions. Word has length 21 [2022-12-13 13:32:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:47,606 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 524 transitions. [2022-12-13 13:32:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 524 transitions. [2022-12-13 13:32:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 13:32:47,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:47,607 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 13:32:47,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 13:32:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:47,809 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:47,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:47,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1445989120, now seen corresponding path program 1 times [2022-12-13 13:32:47,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:47,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634295981] [2022-12-13 13:32:47,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:47,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:47,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:47,815 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:47,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-13 13:32:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:32:47,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:48,099 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 13:32:48,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:48,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:48,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634295981] [2022-12-13 13:32:48,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634295981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:48,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:48,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:32:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371672086] [2022-12-13 13:32:48,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:48,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:32:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:32:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:32:48,100 INFO L87 Difference]: Start difference. First operand 378 states and 524 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:48,578 INFO L93 Difference]: Finished difference Result 412 states and 535 transitions. [2022-12-13 13:32:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:32:48,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-13 13:32:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:48,580 INFO L225 Difference]: With dead ends: 412 [2022-12-13 13:32:48,580 INFO L226 Difference]: Without dead ends: 412 [2022-12-13 13:32:48,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:32:48,581 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 193 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:48,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 459 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:48,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-12-13 13:32:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 378. [2022-12-13 13:32:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 301 states have (on average 1.6611295681063123) internal successors, (500), 363 states have internal predecessors, (500), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 520 transitions. [2022-12-13 13:32:48,588 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 520 transitions. Word has length 22 [2022-12-13 13:32:48,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:48,588 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 520 transitions. [2022-12-13 13:32:48,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 520 transitions. [2022-12-13 13:32:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 13:32:48,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:48,589 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 13:32:48,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 13:32:48,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:48,790 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1182081817, now seen corresponding path program 1 times [2022-12-13 13:32:48,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:48,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578218246] [2022-12-13 13:32:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:48,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:48,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:48,797 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:48,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 13:32:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:48,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:32:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:48,864 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 13:32:48,924 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 13:32:48,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:48,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578218246] [2022-12-13 13:32:48,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578218246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:48,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:48,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:32:48,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725123902] [2022-12-13 13:32:48,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:48,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:48,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:48,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:48,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:48,926 INFO L87 Difference]: Start difference. First operand 378 states and 520 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:49,210 INFO L93 Difference]: Finished difference Result 403 states and 520 transitions. [2022-12-13 13:32:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:32:49,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-13 13:32:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:49,211 INFO L225 Difference]: With dead ends: 403 [2022-12-13 13:32:49,211 INFO L226 Difference]: Without dead ends: 403 [2022-12-13 13:32:49,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:49,212 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 151 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:49,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 330 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 13:32:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-12-13 13:32:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 377. [2022-12-13 13:32:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 301 states have (on average 1.6511627906976745) internal successors, (497), 362 states have internal predecessors, (497), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 517 transitions. [2022-12-13 13:32:49,216 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 517 transitions. Word has length 22 [2022-12-13 13:32:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:49,216 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 517 transitions. [2022-12-13 13:32:49,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 517 transitions. [2022-12-13 13:32:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 13:32:49,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:49,216 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 13:32:49,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 13:32:49,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:49,418 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:49,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1182081623, now seen corresponding path program 1 times [2022-12-13 13:32:49,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:49,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894382614] [2022-12-13 13:32:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:49,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:49,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:49,423 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:49,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 13:32:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:49,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:32:49,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:49,601 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 15 treesize of output 7 [2022-12-13 13:32:49,602 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 15 treesize of output 7 [2022-12-13 13:32:49,631 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 13:32:49,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:49,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:49,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894382614] [2022-12-13 13:32:49,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894382614] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:49,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:49,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:32:49,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096510096] [2022-12-13 13:32:49,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:49,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:32:49,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:49,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:32:49,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:32:49,633 INFO L87 Difference]: Start difference. First operand 377 states and 517 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:50,256 INFO L93 Difference]: Finished difference Result 564 states and 755 transitions. [2022-12-13 13:32:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:32:50,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-13 13:32:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:50,258 INFO L225 Difference]: With dead ends: 564 [2022-12-13 13:32:50,258 INFO L226 Difference]: Without dead ends: 564 [2022-12-13 13:32:50,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:32:50,259 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 148 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:50,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1194 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:32:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-12-13 13:32:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 404. [2022-12-13 13:32:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 328 states have (on average 1.6097560975609757) internal successors, (528), 389 states have internal predecessors, (528), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:32:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 548 transitions. [2022-12-13 13:32:50,264 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 548 transitions. Word has length 22 [2022-12-13 13:32:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:50,264 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 548 transitions. [2022-12-13 13:32:50,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 548 transitions. [2022-12-13 13:32:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 13:32:50,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:50,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:50,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-12-13 13:32:50,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:50,466 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:50,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1875967086, now seen corresponding path program 1 times [2022-12-13 13:32:50,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:50,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325578441] [2022-12-13 13:32:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:50,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:50,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:50,469 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:50,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 13:32:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:50,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:32:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:50,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:32:50,639 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 17 treesize of output 7 [2022-12-13 13:32:50,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:32:50,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:32:50,643 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 17 treesize of output 10 [2022-12-13 13:32:50,682 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 13:32:50,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:50,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:50,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325578441] [2022-12-13 13:32:50,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325578441] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:50,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:50,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:32:50,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134539655] [2022-12-13 13:32:50,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:50,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:32:50,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:32:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:32:50,684 INFO L87 Difference]: Start difference. First operand 404 states and 548 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:51,310 INFO L93 Difference]: Finished difference Result 458 states and 575 transitions. [2022-12-13 13:32:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:32:51,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-12-13 13:32:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:51,313 INFO L225 Difference]: With dead ends: 458 [2022-12-13 13:32:51,313 INFO L226 Difference]: Without dead ends: 458 [2022-12-13 13:32:51,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:32:51,313 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 290 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:51,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1530 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 13:32:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-12-13 13:32:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 307. [2022-12-13 13:32:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 237 states have (on average 1.6160337552742616) internal successors, (383), 297 states have internal predecessors, (383), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:32:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 395 transitions. [2022-12-13 13:32:51,318 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 395 transitions. Word has length 23 [2022-12-13 13:32:51,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:51,318 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 395 transitions. [2022-12-13 13:32:51,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:51,318 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 395 transitions. [2022-12-13 13:32:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 13:32:51,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:51,318 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] [2022-12-13 13:32:51,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 13:32:51,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:51,519 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1867790266, now seen corresponding path program 1 times [2022-12-13 13:32:51,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:51,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976069743] [2022-12-13 13:32:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:51,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:51,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:51,521 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:51,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 13:32:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 13:32:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:51,599 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 13:32:51,699 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 13:32:51,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:51,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:51,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976069743] [2022-12-13 13:32:51,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976069743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:51,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:51,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:32:51,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598149420] [2022-12-13 13:32:51,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:51,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:32:51,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:32:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:32:51,701 INFO L87 Difference]: Start difference. First operand 307 states and 395 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:52,127 INFO L93 Difference]: Finished difference Result 306 states and 393 transitions. [2022-12-13 13:32:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:32:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-12-13 13:32:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:52,129 INFO L225 Difference]: With dead ends: 306 [2022-12-13 13:32:52,129 INFO L226 Difference]: Without dead ends: 306 [2022-12-13 13:32:52,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:32:52,129 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 492 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:52,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 302 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-12-13 13:32:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-12-13 13:32:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 237 states have (on average 1.6075949367088607) internal successors, (381), 296 states have internal predecessors, (381), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:32:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 393 transitions. [2022-12-13 13:32:52,133 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 393 transitions. Word has length 30 [2022-12-13 13:32:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:52,133 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 393 transitions. [2022-12-13 13:32:52,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 393 transitions. [2022-12-13 13:32:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 13:32:52,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:52,133 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] [2022-12-13 13:32:52,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-12-13 13:32:52,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:52,334 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1867790267, now seen corresponding path program 1 times [2022-12-13 13:32:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:52,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003797263] [2022-12-13 13:32:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:52,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:52,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:52,336 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:52,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-13 13:32:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:52,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:32:52,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:52,407 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 7 [2022-12-13 13:32:52,442 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 13:32:52,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:52,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:52,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003797263] [2022-12-13 13:32:52,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003797263] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:52,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:52,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:32:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665662617] [2022-12-13 13:32:52,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:52,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:32:52,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:32:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:32:52,444 INFO L87 Difference]: Start difference. First operand 306 states and 393 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:52,861 INFO L93 Difference]: Finished difference Result 389 states and 485 transitions. [2022-12-13 13:32:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:32:52,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-12-13 13:32:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:52,862 INFO L225 Difference]: With dead ends: 389 [2022-12-13 13:32:52,862 INFO L226 Difference]: Without dead ends: 389 [2022-12-13 13:32:52,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 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 13:32:52,863 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 444 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:52,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 488 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-12-13 13:32:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2022-12-13 13:32:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 237 states have (on average 1.59915611814346) internal successors, (379), 295 states have internal predecessors, (379), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:32:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 391 transitions. [2022-12-13 13:32:52,868 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 391 transitions. Word has length 30 [2022-12-13 13:32:52,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:52,868 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 391 transitions. [2022-12-13 13:32:52,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 391 transitions. [2022-12-13 13:32:52,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 13:32:52,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:52,869 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] [2022-12-13 13:32:52,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-12-13 13:32:53,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:53,070 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:53,071 INFO L85 PathProgramCache]: Analyzing trace with hash 349886374, now seen corresponding path program 1 times [2022-12-13 13:32:53,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:53,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105441558] [2022-12-13 13:32:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:53,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:53,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:53,076 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:53,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-13 13:32:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:32:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:53,201 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 13:32:53,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:53,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:53,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105441558] [2022-12-13 13:32:53,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105441558] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:53,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:53,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:32:53,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030137022] [2022-12-13 13:32:53,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:53,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:53,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:53,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:53,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:53,203 INFO L87 Difference]: Start difference. First operand 305 states and 391 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:53,619 INFO L93 Difference]: Finished difference Result 660 states and 810 transitions. [2022-12-13 13:32:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:32:53,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-12-13 13:32:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:53,621 INFO L225 Difference]: With dead ends: 660 [2022-12-13 13:32:53,621 INFO L226 Difference]: Without dead ends: 660 [2022-12-13 13:32:53,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 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 13:32:53,622 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 458 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:53,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 355 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:32:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-12-13 13:32:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 333. [2022-12-13 13:32:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 268 states have (on average 1.5708955223880596) internal successors, (421), 323 states have internal predecessors, (421), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:32:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 433 transitions. [2022-12-13 13:32:53,626 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 433 transitions. Word has length 32 [2022-12-13 13:32:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:53,626 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 433 transitions. [2022-12-13 13:32:53,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 433 transitions. [2022-12-13 13:32:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 13:32:53,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:53,627 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] [2022-12-13 13:32:53,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-13 13:32:53,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:53,828 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:53,829 INFO L85 PathProgramCache]: Analyzing trace with hash 349886375, now seen corresponding path program 1 times [2022-12-13 13:32:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51659485] [2022-12-13 13:32:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:53,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:53,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:53,834 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:53,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-13 13:32:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 13:32:54,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:54,143 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 13:32:54,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:54,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51659485] [2022-12-13 13:32:54,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51659485] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:54,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:54,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:32:54,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268384981] [2022-12-13 13:32:54,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:54,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:32:54,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:54,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:32:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:32:54,144 INFO L87 Difference]: Start difference. First operand 333 states and 433 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:54,808 INFO L93 Difference]: Finished difference Result 486 states and 613 transitions. [2022-12-13 13:32:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:32:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-12-13 13:32:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:54,810 INFO L225 Difference]: With dead ends: 486 [2022-12-13 13:32:54,810 INFO L226 Difference]: Without dead ends: 486 [2022-12-13 13:32:54,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:32:54,810 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 791 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:54,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 475 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 13:32:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-12-13 13:32:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 332. [2022-12-13 13:32:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 268 states have (on average 1.544776119402985) internal successors, (414), 322 states have internal predecessors, (414), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:32:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 426 transitions. [2022-12-13 13:32:54,814 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 426 transitions. Word has length 32 [2022-12-13 13:32:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:54,814 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 426 transitions. [2022-12-13 13:32:54,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 426 transitions. [2022-12-13 13:32:54,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 13:32:54,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:54,815 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] [2022-12-13 13:32:54,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 13:32:55,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:55,015 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:55,015 INFO L85 PathProgramCache]: Analyzing trace with hash 349886536, now seen corresponding path program 1 times [2022-12-13 13:32:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:55,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631563969] [2022-12-13 13:32:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:55,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:55,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:55,017 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:55,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-13 13:32:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:32:55,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:55,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:32:55,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:32:55,280 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 13:32:55,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:55,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:55,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631563969] [2022-12-13 13:32:55,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631563969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:55,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:55,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:32:55,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631204345] [2022-12-13 13:32:55,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:55,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:32:55,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:32:55,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:32:55,281 INFO L87 Difference]: Start difference. First operand 332 states and 426 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:55,958 INFO L93 Difference]: Finished difference Result 479 states and 552 transitions. [2022-12-13 13:32:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:32:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-12-13 13:32:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:55,960 INFO L225 Difference]: With dead ends: 479 [2022-12-13 13:32:55,960 INFO L226 Difference]: Without dead ends: 479 [2022-12-13 13:32:55,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 13:32:55,961 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 349 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:55,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 309 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 13:32:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-12-13 13:32:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 332. [2022-12-13 13:32:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 268 states have (on average 1.537313432835821) internal successors, (412), 322 states have internal predecessors, (412), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:32:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 424 transitions. [2022-12-13 13:32:55,966 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 424 transitions. Word has length 32 [2022-12-13 13:32:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:55,967 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 424 transitions. [2022-12-13 13:32:55,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 424 transitions. [2022-12-13 13:32:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 13:32:55,967 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:55,967 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:55,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-12-13 13:32:56,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:56,169 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:56,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1398410764, now seen corresponding path program 1 times [2022-12-13 13:32:56,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:56,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106476593] [2022-12-13 13:32:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:56,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:56,173 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:56,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-13 13:32:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:32:56,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:32:56,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:32:56,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:32:56,821 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 32 treesize of output 36 [2022-12-13 13:32:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:32:57,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106476593] [2022-12-13 13:32:57,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106476593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:32:57,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:32:57,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2022-12-13 13:32:57,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995238313] [2022-12-13 13:32:57,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:32:57,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:32:57,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:32:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:32:57,162 INFO L87 Difference]: Start difference. First operand 332 states and 424 transitions. Second operand has 14 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:32:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:58,624 INFO L93 Difference]: Finished difference Result 659 states and 809 transitions. [2022-12-13 13:32:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:32:58,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-12-13 13:32:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:58,628 INFO L225 Difference]: With dead ends: 659 [2022-12-13 13:32:58,628 INFO L226 Difference]: Without dead ends: 659 [2022-12-13 13:32:58,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-12-13 13:32:58,629 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1739 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1740 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:58,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1740 Valid, 662 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 13:32:58,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-12-13 13:32:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 330. [2022-12-13 13:32:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 268 states have (on average 1.5186567164179106) internal successors, (407), 320 states have internal predecessors, (407), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:32:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 419 transitions. [2022-12-13 13:32:58,633 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 419 transitions. Word has length 42 [2022-12-13 13:32:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:58,633 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 419 transitions. [2022-12-13 13:32:58,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:32:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 419 transitions. [2022-12-13 13:32:58,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 13:32:58,633 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:58,633 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:58,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-13 13:32:58,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:58,835 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash -142401782, now seen corresponding path program 1 times [2022-12-13 13:32:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:58,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857423978] [2022-12-13 13:32:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:58,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:58,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:58,840 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:58,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-13 13:32:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:58,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:32:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:32:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:32:59,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:32:59,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:32:59,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857423978] [2022-12-13 13:32:59,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857423978] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:32:59,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:32:59,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:32:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374648469] [2022-12-13 13:32:59,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:32:59,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:32:59,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:32:59,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:32:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:32:59,176 INFO L87 Difference]: Start difference. First operand 330 states and 419 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:32:59,552 INFO L93 Difference]: Finished difference Result 346 states and 435 transitions. [2022-12-13 13:32:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:32:59,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-12-13 13:32:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:32:59,554 INFO L225 Difference]: With dead ends: 346 [2022-12-13 13:32:59,554 INFO L226 Difference]: Without dead ends: 346 [2022-12-13 13:32:59,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:32:59,554 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 472 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:32:59,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 257 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 13:32:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-12-13 13:32:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 330. [2022-12-13 13:32:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 270 states have (on average 1.511111111111111) internal successors, (408), 320 states have internal predecessors, (408), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:32:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 420 transitions. [2022-12-13 13:32:59,558 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 420 transitions. Word has length 41 [2022-12-13 13:32:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:32:59,558 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 420 transitions. [2022-12-13 13:32:59,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:32:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 420 transitions. [2022-12-13 13:32:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 13:32:59,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:32:59,558 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:32:59,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-13 13:32:59,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:59,759 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:32:59,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:32:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash -142401720, now seen corresponding path program 1 times [2022-12-13 13:32:59,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:32:59,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084908493] [2022-12-13 13:32:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:32:59,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:32:59,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:32:59,765 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:32:59,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-13 13:32:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:32:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:32:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:00,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:00,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084908493] [2022-12-13 13:33:00,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084908493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:00,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:00,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:33:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172671023] [2022-12-13 13:33:00,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:00,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:33:00,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:33:00,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:33:00,101 INFO L87 Difference]: Start difference. First operand 330 states and 420 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:00,509 INFO L93 Difference]: Finished difference Result 345 states and 433 transitions. [2022-12-13 13:33:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:33:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-12-13 13:33:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:00,511 INFO L225 Difference]: With dead ends: 345 [2022-12-13 13:33:00,511 INFO L226 Difference]: Without dead ends: 345 [2022-12-13 13:33:00,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:33:00,511 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 299 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:00,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 272 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:33:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-12-13 13:33:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 327. [2022-12-13 13:33:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 268 states have (on average 1.5037313432835822) internal successors, (403), 317 states have internal predecessors, (403), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:33:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 415 transitions. [2022-12-13 13:33:00,514 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 415 transitions. Word has length 41 [2022-12-13 13:33:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:00,514 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 415 transitions. [2022-12-13 13:33:00,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 415 transitions. [2022-12-13 13:33:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:33:00,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:00,515 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:00,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-13 13:33:00,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:00,716 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash 452022869, now seen corresponding path program 1 times [2022-12-13 13:33:00,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:00,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462954821] [2022-12-13 13:33:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:00,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:00,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:00,722 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:00,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-13 13:33:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 13:33:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:01,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:01,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:01,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462954821] [2022-12-13 13:33:01,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462954821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:01,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:01,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:33:01,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122938174] [2022-12-13 13:33:01,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:01,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:33:01,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:01,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:33:01,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:33:01,058 INFO L87 Difference]: Start difference. First operand 327 states and 415 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:33:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:01,536 INFO L93 Difference]: Finished difference Result 460 states and 576 transitions. [2022-12-13 13:33:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:33:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-12-13 13:33:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:01,538 INFO L225 Difference]: With dead ends: 460 [2022-12-13 13:33:01,538 INFO L226 Difference]: Without dead ends: 460 [2022-12-13 13:33:01,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:33:01,539 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 551 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:01,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 275 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:33:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-12-13 13:33:01,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 326. [2022-12-13 13:33:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 268 states have (on average 1.4962686567164178) internal successors, (401), 316 states have internal predecessors, (401), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 13:33:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 413 transitions. [2022-12-13 13:33:01,542 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 413 transitions. Word has length 44 [2022-12-13 13:33:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:01,542 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 413 transitions. [2022-12-13 13:33:01,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:33:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 413 transitions. [2022-12-13 13:33:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:33:01,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:01,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:01,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-13 13:33:01,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:01,744 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:01,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1136408711, now seen corresponding path program 1 times [2022-12-13 13:33:01,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:01,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308730125] [2022-12-13 13:33:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:01,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:01,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:01,749 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:01,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-13 13:33:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:01,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 13:33:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:01,919 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 7 [2022-12-13 13:33:02,054 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 15 treesize of output 11 [2022-12-13 13:33:02,096 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 27 treesize of output 11 [2022-12-13 13:33:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:02,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:02,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:02,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308730125] [2022-12-13 13:33:02,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308730125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:02,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:02,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 13:33:02,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482129421] [2022-12-13 13:33:02,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:02,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:33:02,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:02,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:33:02,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:33:02,120 INFO L87 Difference]: Start difference. First operand 326 states and 413 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:03,683 INFO L93 Difference]: Finished difference Result 685 states and 854 transitions. [2022-12-13 13:33:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:33:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-12-13 13:33:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:03,685 INFO L225 Difference]: With dead ends: 685 [2022-12-13 13:33:03,685 INFO L226 Difference]: Without dead ends: 685 [2022-12-13 13:33:03,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-12-13 13:33:03,685 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 704 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:03,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 886 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 13:33:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-12-13 13:33:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 388. [2022-12-13 13:33:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 325 states have (on average 1.476923076923077) internal successors, (480), 374 states have internal predecessors, (480), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 13:33:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 500 transitions. [2022-12-13 13:33:03,692 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 500 transitions. Word has length 44 [2022-12-13 13:33:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:03,692 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 500 transitions. [2022-12-13 13:33:03,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 500 transitions. [2022-12-13 13:33:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:33:03,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:03,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:03,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-13 13:33:03,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:03,894 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1136408712, now seen corresponding path program 1 times [2022-12-13 13:33:03,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:03,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234316949] [2022-12-13 13:33:03,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:03,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:03,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:03,898 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:03,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-13 13:33:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:04,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 13:33:04,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:04,067 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 13:33:04,231 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 15 treesize of output 11 [2022-12-13 13:33:04,236 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 15 treesize of output 11 [2022-12-13 13:33:04,312 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 9 [2022-12-13 13:33:04,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 13:33:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:04,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:04,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:04,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234316949] [2022-12-13 13:33:04,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234316949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:04,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:04,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 13:33:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323306637] [2022-12-13 13:33:04,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:33:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:04,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:33:04,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:33:04,351 INFO L87 Difference]: Start difference. First operand 388 states and 500 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:05,870 INFO L93 Difference]: Finished difference Result 735 states and 918 transitions. [2022-12-13 13:33:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 13:33:05,870 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-12-13 13:33:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:05,874 INFO L225 Difference]: With dead ends: 735 [2022-12-13 13:33:05,874 INFO L226 Difference]: Without dead ends: 735 [2022-12-13 13:33:05,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-12-13 13:33:05,875 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 749 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:05,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 974 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 13:33:05,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-12-13 13:33:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 437. [2022-12-13 13:33:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 371 states have (on average 1.5013477088948788) internal successors, (557), 421 states have internal predecessors, (557), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 13:33:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 581 transitions. [2022-12-13 13:33:05,882 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 581 transitions. Word has length 44 [2022-12-13 13:33:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:05,882 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 581 transitions. [2022-12-13 13:33:05,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 581 transitions. [2022-12-13 13:33:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:33:05,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:05,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:05,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-12-13 13:33:06,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:06,084 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:06,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:06,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1138255753, now seen corresponding path program 1 times [2022-12-13 13:33:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:06,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320855728] [2022-12-13 13:33:06,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:06,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:06,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:06,089 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:06,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-13 13:33:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 13:33:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:06,363 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:33:06,364 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 13 treesize of output 13 [2022-12-13 13:33:06,464 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 15 treesize of output 11 [2022-12-13 13:33:06,475 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 15 treesize of output 11 [2022-12-13 13:33:06,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:06,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 13:33:06,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:06,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 13:33:06,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 13:33:06,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 13:33:06,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 13:33:06,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 13:33:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:06,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:06,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:06,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320855728] [2022-12-13 13:33:06,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320855728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:06,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:06,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 13:33:06,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302680807] [2022-12-13 13:33:06,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:06,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:33:06,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:33:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:33:06,677 INFO L87 Difference]: Start difference. First operand 437 states and 581 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:08,191 INFO L93 Difference]: Finished difference Result 709 states and 876 transitions. [2022-12-13 13:33:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 13:33:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-12-13 13:33:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:08,193 INFO L225 Difference]: With dead ends: 709 [2022-12-13 13:33:08,193 INFO L226 Difference]: Without dead ends: 709 [2022-12-13 13:33:08,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-12-13 13:33:08,194 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 676 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:08,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1180 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 13:33:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-12-13 13:33:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 442. [2022-12-13 13:33:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 376 states have (on average 1.4946808510638299) internal successors, (562), 426 states have internal predecessors, (562), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 13:33:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 586 transitions. [2022-12-13 13:33:08,200 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 586 transitions. Word has length 44 [2022-12-13 13:33:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:08,200 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 586 transitions. [2022-12-13 13:33:08,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 586 transitions. [2022-12-13 13:33:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 13:33:08,202 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:08,202 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:08,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-13 13:33:08,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:08,404 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1759549254, now seen corresponding path program 1 times [2022-12-13 13:33:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:08,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216128200] [2022-12-13 13:33:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:08,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:08,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:08,409 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:08,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-13 13:33:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:08,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 13:33:08,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:08,558 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 7 [2022-12-13 13:33:08,708 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 15 treesize of output 11 [2022-12-13 13:33:08,753 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 27 treesize of output 11 [2022-12-13 13:33:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:08,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:08,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:08,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216128200] [2022-12-13 13:33:08,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216128200] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:08,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:08,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 13:33:08,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188311894] [2022-12-13 13:33:08,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:08,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:33:08,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:08,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:33:08,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:33:08,779 INFO L87 Difference]: Start difference. First operand 442 states and 586 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:10,320 INFO L93 Difference]: Finished difference Result 748 states and 972 transitions. [2022-12-13 13:33:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 13:33:10,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-12-13 13:33:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:10,325 INFO L225 Difference]: With dead ends: 748 [2022-12-13 13:33:10,325 INFO L226 Difference]: Without dead ends: 748 [2022-12-13 13:33:10,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-12-13 13:33:10,325 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 972 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:10,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 1072 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 13:33:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-12-13 13:33:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 499. [2022-12-13 13:33:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 427 states have (on average 1.484777517564403) internal successors, (634), 479 states have internal predecessors, (634), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-13 13:33:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 666 transitions. [2022-12-13 13:33:10,331 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 666 transitions. Word has length 45 [2022-12-13 13:33:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:10,331 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 666 transitions. [2022-12-13 13:33:10,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 666 transitions. [2022-12-13 13:33:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 13:33:10,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:10,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:10,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-12-13 13:33:10,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:10,534 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1759549255, now seen corresponding path program 1 times [2022-12-13 13:33:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:10,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496617544] [2022-12-13 13:33:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:10,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:10,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:10,540 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:10,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-13 13:33:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:10,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 13:33:10,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:10,690 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 13:33:10,978 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 15 treesize of output 11 [2022-12-13 13:33:10,982 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 15 treesize of output 11 [2022-12-13 13:33:11,065 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 9 [2022-12-13 13:33:11,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 13:33:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:11,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:11,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:11,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496617544] [2022-12-13 13:33:11,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496617544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:11,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:11,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 13:33:11,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271641790] [2022-12-13 13:33:11,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:33:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:33:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:33:11,117 INFO L87 Difference]: Start difference. First operand 499 states and 666 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:12,715 INFO L93 Difference]: Finished difference Result 701 states and 916 transitions. [2022-12-13 13:33:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 13:33:12,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-12-13 13:33:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:12,717 INFO L225 Difference]: With dead ends: 701 [2022-12-13 13:33:12,717 INFO L226 Difference]: Without dead ends: 701 [2022-12-13 13:33:12,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-12-13 13:33:12,718 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 1084 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:12,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 982 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 13:33:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-12-13 13:33:12,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 448. [2022-12-13 13:33:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 382 states have (on average 1.4921465968586387) internal successors, (570), 432 states have internal predecessors, (570), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 13:33:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 594 transitions. [2022-12-13 13:33:12,723 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 594 transitions. Word has length 45 [2022-12-13 13:33:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:12,723 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 594 transitions. [2022-12-13 13:33:12,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 594 transitions. [2022-12-13 13:33:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 13:33:12,723 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:12,723 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:12,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-12-13 13:33:12,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:12,925 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:12,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1761396296, now seen corresponding path program 1 times [2022-12-13 13:33:12,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:12,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247291019] [2022-12-13 13:33:12,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:12,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:12,930 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:12,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-13 13:33:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:13,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 13:33:13,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:13,389 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:33:13,390 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 13:33:13,408 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:33:13,408 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 13:33:13,482 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:33:13,482 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 18 treesize of output 24 [2022-12-13 13:33:13,506 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:33:13,506 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 18 treesize of output 24 [2022-12-13 13:33:13,559 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:33:13,559 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 18 treesize of output 24 [2022-12-13 13:33:13,585 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:33:13,586 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 18 treesize of output 24 [2022-12-13 13:33:13,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:13,687 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 27 treesize of output 26 [2022-12-13 13:33:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:13,701 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 27 treesize of output 26 [2022-12-13 13:33:13,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:13,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:33:13,991 INFO L321 Elim1Store]: treesize reduction 22, result has 38.9 percent of original size [2022-12-13 13:33:13,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 41 [2022-12-13 13:33:14,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:14,003 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 23 treesize of output 22 [2022-12-13 13:33:14,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:33:14,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-12-13 13:33:14,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:33:14,063 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 17 treesize of output 7 [2022-12-13 13:33:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:14,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:14,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247291019] [2022-12-13 13:33:14,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247291019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:14,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:14,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 13:33:14,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455369483] [2022-12-13 13:33:14,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:33:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:14,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:33:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:33:14,090 INFO L87 Difference]: Start difference. First operand 448 states and 594 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:16,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:33:20,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:33:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:21,121 INFO L93 Difference]: Finished difference Result 467 states and 613 transitions. [2022-12-13 13:33:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:33:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-12-13 13:33:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:21,122 INFO L225 Difference]: With dead ends: 467 [2022-12-13 13:33:21,122 INFO L226 Difference]: Without dead ends: 467 [2022-12-13 13:33:21,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-12-13 13:33:21,123 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 62 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:21,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1429 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 508 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-12-13 13:33:21,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-12-13 13:33:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 466. [2022-12-13 13:33:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 400 states have (on average 1.47) internal successors, (588), 450 states have internal predecessors, (588), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 13:33:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 612 transitions. [2022-12-13 13:33:21,127 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 612 transitions. Word has length 45 [2022-12-13 13:33:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:21,127 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 612 transitions. [2022-12-13 13:33:21,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 612 transitions. [2022-12-13 13:33:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 13:33:21,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:21,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:21,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-12-13 13:33:21,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:21,329 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:21,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2124978033, now seen corresponding path program 1 times [2022-12-13 13:33:21,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:21,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283547797] [2022-12-13 13:33:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:21,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:21,333 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:21,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-12-13 13:33:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:21,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 13:33:21,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:21,498 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 7 [2022-12-13 13:33:21,671 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 15 treesize of output 11 [2022-12-13 13:33:21,726 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 27 treesize of output 11 [2022-12-13 13:33:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:21,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:21,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:21,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283547797] [2022-12-13 13:33:21,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283547797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:21,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:21,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 13:33:21,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692915099] [2022-12-13 13:33:21,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:21,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:33:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:33:21,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:33:21,754 INFO L87 Difference]: Start difference. First operand 466 states and 612 transitions. Second operand has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:23,204 INFO L93 Difference]: Finished difference Result 836 states and 1097 transitions. [2022-12-13 13:33:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:33:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-12-13 13:33:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:23,206 INFO L225 Difference]: With dead ends: 836 [2022-12-13 13:33:23,206 INFO L226 Difference]: Without dead ends: 836 [2022-12-13 13:33:23,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-12-13 13:33:23,206 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 798 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:23,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 910 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 13:33:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-12-13 13:33:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 563. [2022-12-13 13:33:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 485 states have (on average 1.4597938144329896) internal successors, (708), 539 states have internal predecessors, (708), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 13 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-13 13:33:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 748 transitions. [2022-12-13 13:33:23,213 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 748 transitions. Word has length 46 [2022-12-13 13:33:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:23,213 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 748 transitions. [2022-12-13 13:33:23,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 748 transitions. [2022-12-13 13:33:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 13:33:23,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:23,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:23,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-12-13 13:33:23,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:23,415 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2124978034, now seen corresponding path program 1 times [2022-12-13 13:33:23,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:23,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779386293] [2022-12-13 13:33:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:23,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:23,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:23,420 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:23,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-13 13:33:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:23,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 13:33:23,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:23,612 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 13:33:23,940 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 15 treesize of output 11 [2022-12-13 13:33:23,947 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 15 treesize of output 11 [2022-12-13 13:33:24,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 13:33:24,052 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 9 [2022-12-13 13:33:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:24,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:24,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779386293] [2022-12-13 13:33:24,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779386293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:24,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:24,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 13:33:24,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138116294] [2022-12-13 13:33:24,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:24,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:33:24,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:33:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:33:24,110 INFO L87 Difference]: Start difference. First operand 563 states and 748 transitions. Second operand has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:25,695 INFO L93 Difference]: Finished difference Result 819 states and 1087 transitions. [2022-12-13 13:33:25,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:33:25,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-12-13 13:33:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:25,698 INFO L225 Difference]: With dead ends: 819 [2022-12-13 13:33:25,698 INFO L226 Difference]: Without dead ends: 819 [2022-12-13 13:33:25,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:33:25,698 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 932 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:25,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 823 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 13:33:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-12-13 13:33:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 644. [2022-12-13 13:33:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 560 states have (on average 1.4964285714285714) internal successors, (838), 616 states have internal predecessors, (838), 24 states have call successors, (24), 12 states have call predecessors, (24), 12 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 13:33:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 886 transitions. [2022-12-13 13:33:25,706 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 886 transitions. Word has length 46 [2022-12-13 13:33:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:25,706 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 886 transitions. [2022-12-13 13:33:25,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 886 transitions. [2022-12-13 13:33:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 13:33:25,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:25,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:25,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-13 13:33:25,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:25,908 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1392550025, now seen corresponding path program 1 times [2022-12-13 13:33:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:25,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935104859] [2022-12-13 13:33:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:25,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:25,911 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:25,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-13 13:33:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:26,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:33:26,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:26,208 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 13:33:26,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:33:26,290 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 13:33:26,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:26,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935104859] [2022-12-13 13:33:26,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935104859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:33:26,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:33:26,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-13 13:33:26,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975145635] [2022-12-13 13:33:26,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:33:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:33:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:33:26,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:33:26,291 INFO L87 Difference]: Start difference. First operand 644 states and 886 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:33:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:26,386 INFO L93 Difference]: Finished difference Result 3272 states and 4624 transitions. [2022-12-13 13:33:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:33:26,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-12-13 13:33:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:26,392 INFO L225 Difference]: With dead ends: 3272 [2022-12-13 13:33:26,392 INFO L226 Difference]: Without dead ends: 3272 [2022-12-13 13:33:26,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:33:26,392 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 836 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:26,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1044 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:33:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-12-13 13:33:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2359. [2022-12-13 13:33:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2207 states have (on average 1.543271409152696) internal successors, (3406), 2287 states have internal predecessors, (3406), 92 states have call successors, (92), 12 states have call predecessors, (92), 12 states have return successors, (92), 59 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-13 13:33:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 3590 transitions. [2022-12-13 13:33:26,420 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 3590 transitions. Word has length 47 [2022-12-13 13:33:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:26,420 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 3590 transitions. [2022-12-13 13:33:26,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:33:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 3590 transitions. [2022-12-13 13:33:26,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 13:33:26,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:26,421 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:26,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-13 13:33:26,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:26,622 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1195357345, now seen corresponding path program 1 times [2022-12-13 13:33:26,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:26,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274854019] [2022-12-13 13:33:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:26,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:26,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:26,628 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:26,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-12-13 13:33:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:33:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:26,899 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-13 13:33:26,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 13:33:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:27,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:33:27,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:27,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274854019] [2022-12-13 13:33:27,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274854019] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:33:27,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [40473291] [2022-12-13 13:33:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:27,491 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-13 13:33:27,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 [2022-12-13 13:33:27,492 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-13 13:33:27,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-12-13 13:33:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:33:27,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:27,807 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-13 13:33:27,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 13:33:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:28,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:33:28,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [40473291] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:33:28,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:33:28,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2022-12-13 13:33:28,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818846406] [2022-12-13 13:33:28,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:33:28,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:33:28,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:28,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:33:28,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:33:28,330 INFO L87 Difference]: Start difference. First operand 2359 states and 3590 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 13:33:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:29,195 INFO L93 Difference]: Finished difference Result 4088 states and 6150 transitions. [2022-12-13 13:33:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:33:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2022-12-13 13:33:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:29,204 INFO L225 Difference]: With dead ends: 4088 [2022-12-13 13:33:29,204 INFO L226 Difference]: Without dead ends: 4088 [2022-12-13 13:33:29,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:33:29,204 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 652 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:29,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 451 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 13:33:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2022-12-13 13:33:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 2358. [2022-12-13 13:33:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2207 states have (on average 1.5251472587222474) internal successors, (3366), 2286 states have internal predecessors, (3366), 92 states have call successors, (92), 12 states have call predecessors, (92), 12 states have return successors, (92), 59 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-13 13:33:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 3550 transitions. [2022-12-13 13:33:29,232 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 3550 transitions. Word has length 50 [2022-12-13 13:33:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:29,233 INFO L495 AbstractCegarLoop]: Abstraction has 2358 states and 3550 transitions. [2022-12-13 13:33:29,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 13:33:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 3550 transitions. [2022-12-13 13:33:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 13:33:29,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:29,233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:29,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-12-13 13:33:29,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-12-13 13:33:29,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt [2022-12-13 13:33:29,635 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:29,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:29,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1787765011, now seen corresponding path program 1 times [2022-12-13 13:33:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:29,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006527395] [2022-12-13 13:33:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:29,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:29,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:29,641 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:29,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-13 13:33:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:29,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 13:33:29,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:29,892 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:33:29,892 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 13 treesize of output 13 [2022-12-13 13:33:30,190 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 15 treesize of output 11 [2022-12-13 13:33:30,264 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 13:33:30,264 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 39 treesize of output 30 [2022-12-13 13:33:30,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-12-13 13:33:30,441 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 13:33:30,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:33:30,836 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 106 treesize of output 98 [2022-12-13 13:33:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:31,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006527395] [2022-12-13 13:33:31,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006527395] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 13:33:31,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:33:31,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 22 [2022-12-13 13:33:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006829290] [2022-12-13 13:33:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:31,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 13:33:31,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 13:33:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-12-13 13:33:31,285 INFO L87 Difference]: Start difference. First operand 2358 states and 3550 transitions. Second operand has 11 states, 10 states have (on average 4.7) internal successors, (47), 11 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:33,405 INFO L93 Difference]: Finished difference Result 3341 states and 5037 transitions. [2022-12-13 13:33:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:33:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 11 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-12-13 13:33:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:33,412 INFO L225 Difference]: With dead ends: 3341 [2022-12-13 13:33:33,412 INFO L226 Difference]: Without dead ends: 3341 [2022-12-13 13:33:33,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 13:33:33,412 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1141 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:33,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1141 Valid, 772 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 13:33:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2022-12-13 13:33:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2867. [2022-12-13 13:33:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2682 states have (on average 1.5335570469798658) internal successors, (4113), 2775 states have internal predecessors, (4113), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 75 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:33:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 4357 transitions. [2022-12-13 13:33:33,441 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 4357 transitions. Word has length 49 [2022-12-13 13:33:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:33,441 INFO L495 AbstractCegarLoop]: Abstraction has 2867 states and 4357 transitions. [2022-12-13 13:33:33,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 11 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 4357 transitions. [2022-12-13 13:33:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 13:33:33,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:33,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:33,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-13 13:33:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:33,642 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:33,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:33,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1697855659, now seen corresponding path program 1 times [2022-12-13 13:33:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:33,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494228941] [2022-12-13 13:33:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:33,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:33,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:33,644 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:33,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-13 13:33:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:33,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:33:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:34,112 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 15 treesize of output 11 [2022-12-13 13:33:34,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-12-13 13:33:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:34,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:34,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:34,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494228941] [2022-12-13 13:33:34,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494228941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:34,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:34,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 13:33:34,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346580838] [2022-12-13 13:33:34,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:34,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 13:33:34,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:34,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 13:33:34,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:33:34,275 INFO L87 Difference]: Start difference. First operand 2867 states and 4357 transitions. Second operand has 11 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:35,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:35,705 INFO L93 Difference]: Finished difference Result 3354 states and 5046 transitions. [2022-12-13 13:33:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:33:35,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-12-13 13:33:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:35,710 INFO L225 Difference]: With dead ends: 3354 [2022-12-13 13:33:35,710 INFO L226 Difference]: Without dead ends: 3354 [2022-12-13 13:33:35,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:33:35,711 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 917 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:35,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 875 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 13:33:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2022-12-13 13:33:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 2867. [2022-12-13 13:33:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2682 states have (on average 1.5335570469798658) internal successors, (4113), 2775 states have internal predecessors, (4113), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 75 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:33:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 4357 transitions. [2022-12-13 13:33:35,736 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 4357 transitions. Word has length 49 [2022-12-13 13:33:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:35,737 INFO L495 AbstractCegarLoop]: Abstraction has 2867 states and 4357 transitions. [2022-12-13 13:33:35,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:33:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 4357 transitions. [2022-12-13 13:33:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 13:33:35,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:35,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-12-13 13:33:35,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-13 13:33:35,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:35,938 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1824706372, now seen corresponding path program 1 times [2022-12-13 13:33:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:35,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788408945] [2022-12-13 13:33:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:35,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:35,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:35,944 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:35,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-13 13:33:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:36,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 13:33:36,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:36,185 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 7 [2022-12-13 13:33:36,344 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 15 treesize of output 11 [2022-12-13 13:33:36,395 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 13:33:36,395 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 30 [2022-12-13 13:33:36,477 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 13:33:36,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-12-13 13:33:36,520 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 19 treesize of output 11 [2022-12-13 13:33:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:36,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:33:38,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2022-12-13 13:33:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:33:40,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:40,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788408945] [2022-12-13 13:33:40,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788408945] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:33:40,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:33:40,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2022-12-13 13:33:40,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689638837] [2022-12-13 13:33:40,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:33:40,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 13:33:40,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 13:33:40,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=367, Unknown=1, NotChecked=0, Total=420 [2022-12-13 13:33:40,010 INFO L87 Difference]: Start difference. First operand 2867 states and 4357 transitions. Second operand has 21 states, 20 states have (on average 3.95) internal successors, (79), 18 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 13:33:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:44,296 INFO L93 Difference]: Finished difference Result 3695 states and 5706 transitions. [2022-12-13 13:33:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 13:33:44,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.95) internal successors, (79), 18 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-12-13 13:33:44,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:44,302 INFO L225 Difference]: With dead ends: 3695 [2022-12-13 13:33:44,303 INFO L226 Difference]: Without dead ends: 3695 [2022-12-13 13:33:44,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=233, Invalid=956, Unknown=1, NotChecked=0, Total=1190 [2022-12-13 13:33:44,303 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1639 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1639 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:44,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1639 Valid, 1708 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-13 13:33:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-12-13 13:33:44,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 2947. [2022-12-13 13:33:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2762 states have (on average 1.5253439536567706) internal successors, (4213), 2847 states have internal predecessors, (4213), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:33:44,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 4457 transitions. [2022-12-13 13:33:44,335 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 4457 transitions. Word has length 51 [2022-12-13 13:33:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:44,335 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 4457 transitions. [2022-12-13 13:33:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.95) internal successors, (79), 18 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 13:33:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 4457 transitions. [2022-12-13 13:33:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 13:33:44,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:44,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-12-13 13:33:44,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-12-13 13:33:44,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:44,536 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1824706371, now seen corresponding path program 1 times [2022-12-13 13:33:44,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:44,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479257039] [2022-12-13 13:33:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:44,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:44,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:44,538 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:44,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-12-13 13:33:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:44,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 13:33:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:44,794 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 13:33:44,804 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 7 [2022-12-13 13:33:45,340 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 15 treesize of output 11 [2022-12-13 13:33:45,351 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 15 treesize of output 11 [2022-12-13 13:33:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:45,455 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 27 treesize of output 26 [2022-12-13 13:33:45,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:45,463 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 44 treesize of output 35 [2022-12-13 13:33:45,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:45,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:33:45,723 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-13 13:33:45,723 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 19 treesize of output 19 [2022-12-13 13:33:45,901 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 9 [2022-12-13 13:33:45,907 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 19 treesize of output 7 [2022-12-13 13:33:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:45,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:33:46,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:46,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479257039] [2022-12-13 13:33:46,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479257039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:33:46,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1063971835] [2022-12-13 13:33:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:46,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-13 13:33:46,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 [2022-12-13 13:33:46,847 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-13 13:33:46,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-13 13:33:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:47,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 13:33:47,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:47,336 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 7 [2022-12-13 13:33:47,345 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 13:33:48,196 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 15 treesize of output 11 [2022-12-13 13:33:48,218 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 15 treesize of output 11 [2022-12-13 13:33:48,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:48,390 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 44 treesize of output 35 [2022-12-13 13:33:48,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:48,408 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 27 treesize of output 26 [2022-12-13 13:33:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:33:48,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 13:33:48,823 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-13 13:33:48,824 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 19 treesize of output 19 [2022-12-13 13:33:49,081 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 19 treesize of output 7 [2022-12-13 13:33:49,088 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 9 [2022-12-13 13:33:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:49,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:33:49,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1063971835] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:33:49,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:33:49,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2022-12-13 13:33:49,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580534086] [2022-12-13 13:33:49,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:33:49,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 13:33:49,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 13:33:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-12-13 13:33:49,415 INFO L87 Difference]: Start difference. First operand 2947 states and 4457 transitions. Second operand has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 23 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:33:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:54,009 INFO L93 Difference]: Finished difference Result 3738 states and 5760 transitions. [2022-12-13 13:33:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 13:33:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 23 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2022-12-13 13:33:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:54,017 INFO L225 Difference]: With dead ends: 3738 [2022-12-13 13:33:54,017 INFO L226 Difference]: Without dead ends: 3738 [2022-12-13 13:33:54,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 13:33:54,018 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1947 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:54,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1948 Valid, 1206 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-13 13:33:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2022-12-13 13:33:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 2947. [2022-12-13 13:33:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2762 states have (on average 1.5224475018102823) internal successors, (4205), 2847 states have internal predecessors, (4205), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:33:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 4449 transitions. [2022-12-13 13:33:54,064 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 4449 transitions. Word has length 51 [2022-12-13 13:33:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:54,064 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 4449 transitions. [2022-12-13 13:33:54,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 23 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:33:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 4449 transitions. [2022-12-13 13:33:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 13:33:54,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:54,065 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:54,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-12-13 13:33:54,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-12-13 13:33:54,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt [2022-12-13 13:33:54,466 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:54,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1974499253, now seen corresponding path program 1 times [2022-12-13 13:33:54,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:54,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642320516] [2022-12-13 13:33:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:54,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:54,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:54,468 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:54,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-13 13:33:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:54,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:33:54,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:55,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:33:55,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:33:55,426 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 32 treesize of output 36 [2022-12-13 13:33:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:33:55,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:55,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642320516] [2022-12-13 13:33:55,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642320516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:33:55,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:33:55,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2022-12-13 13:33:55,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419721595] [2022-12-13 13:33:55,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:33:55,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:33:55,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:55,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:33:55,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:33:55,843 INFO L87 Difference]: Start difference. First operand 2947 states and 4449 transitions. Second operand has 14 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:33:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:57,586 INFO L93 Difference]: Finished difference Result 5135 states and 7569 transitions. [2022-12-13 13:33:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:33:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-12-13 13:33:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:57,592 INFO L225 Difference]: With dead ends: 5135 [2022-12-13 13:33:57,592 INFO L226 Difference]: Without dead ends: 5135 [2022-12-13 13:33:57,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-12-13 13:33:57,593 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1504 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:57,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1505 Valid, 658 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 13:33:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5135 states. [2022-12-13 13:33:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5135 to 2945. [2022-12-13 13:33:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2762 states have (on average 1.4840695148443157) internal successors, (4099), 2845 states have internal predecessors, (4099), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:33:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 4343 transitions. [2022-12-13 13:33:57,626 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 4343 transitions. Word has length 52 [2022-12-13 13:33:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:57,626 INFO L495 AbstractCegarLoop]: Abstraction has 2945 states and 4343 transitions. [2022-12-13 13:33:57,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 13:33:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 4343 transitions. [2022-12-13 13:33:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 13:33:57,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:57,627 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:57,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-12-13 13:33:57,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:57,827 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:57,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1079934564, now seen corresponding path program 1 times [2022-12-13 13:33:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:57,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945217254] [2022-12-13 13:33:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:57,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:57,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:57,829 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:57,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-13 13:33:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 13:33:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:33:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:33:58,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:33:58,440 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:33:58,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945217254] [2022-12-13 13:33:58,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945217254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:33:58,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:33:58,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:33:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758490850] [2022-12-13 13:33:58,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:33:58,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:33:58,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:33:58,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:33:58,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:33:58,441 INFO L87 Difference]: Start difference. First operand 2945 states and 4343 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:33:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:33:59,120 INFO L93 Difference]: Finished difference Result 3468 states and 4999 transitions. [2022-12-13 13:33:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:33:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-12-13 13:33:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:33:59,129 INFO L225 Difference]: With dead ends: 3468 [2022-12-13 13:33:59,129 INFO L226 Difference]: Without dead ends: 3468 [2022-12-13 13:33:59,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:33:59,130 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 520 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:33:59,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 272 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 13:33:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2022-12-13 13:33:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 2944. [2022-12-13 13:33:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2944 states, 2762 states have (on average 1.4648805213613323) internal successors, (4046), 2844 states have internal predecessors, (4046), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:33:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 4290 transitions. [2022-12-13 13:33:59,175 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 4290 transitions. Word has length 53 [2022-12-13 13:33:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:33:59,175 INFO L495 AbstractCegarLoop]: Abstraction has 2944 states and 4290 transitions. [2022-12-13 13:33:59,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:33:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 4290 transitions. [2022-12-13 13:33:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 13:33:59,176 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:33:59,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:33:59,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-12-13 13:33:59,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:59,376 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:33:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1552755868, now seen corresponding path program 1 times [2022-12-13 13:33:59,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:59,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060930507] [2022-12-13 13:33:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:59,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:59,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:59,378 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:59,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-12-13 13:33:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:33:59,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:00,055 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 15 treesize of output 11 [2022-12-13 13:34:00,160 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 13:34:00,160 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 43 treesize of output 34 [2022-12-13 13:34:00,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2022-12-13 13:34:00,441 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~cursor~1#1.base_16| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~cursor~1#1.base_16| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~cursor~1#1.base_16|) (_ bv0 1)))) is different from true [2022-12-13 13:34:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 13:34:00,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:00,718 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1032 (_ BitVec 32))) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (bvadd |c_ULTIMATE.start_append_one_~list#1.offset| (bvmul (_ bv4 32) ~unnamed1~0~LIST_END)) v_ArrVal_1032)) |c_~#list~0.base|) (bvadd |c_~#list~0.offset| (bvmul (_ bv4 32) ~unnamed1~0~LIST_BEG))) (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-12-13 13:34:00,740 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 286 treesize of output 270 [2022-12-13 13:34:12,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:34:12,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060930507] [2022-12-13 13:34:12,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060930507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:12,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1103087829] [2022-12-13 13:34:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:12,577 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-13 13:34:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 [2022-12-13 13:34:12,578 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-13 13:34:12,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-12-13 13:34:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:12,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:34:12,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:13,944 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 15 treesize of output 11 [2022-12-13 13:34:14,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:14,112 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 43 treesize of output 34 [2022-12-13 13:34:14,431 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 33 treesize of output 15 [2022-12-13 13:34:14,786 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 13:34:14,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:14,841 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1079 (_ BitVec 32))) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (bvadd |c_ULTIMATE.start_append_one_~list#1.offset| (bvmul (_ bv4 32) ~unnamed1~0~LIST_END)) v_ArrVal_1079)) |c_~#list~0.base|) (bvadd |c_~#list~0.offset| (bvmul (_ bv4 32) ~unnamed1~0~LIST_BEG))) (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-12-13 13:34:14,863 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 142 treesize of output 134 [2022-12-13 13:34:19,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1103087829] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:19,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:34:19,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 26 [2022-12-13 13:34:19,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682206391] [2022-12-13 13:34:19,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:19,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 13:34:19,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:34:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 13:34:19,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1076, Unknown=6, NotChecked=204, Total=1406 [2022-12-13 13:34:19,859 INFO L87 Difference]: Start difference. First operand 2944 states and 4290 transitions. Second operand has 27 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:34:26,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:34:26,214 INFO L93 Difference]: Finished difference Result 3067 states and 4440 transitions. [2022-12-13 13:34:26,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:34:26,214 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-12-13 13:34:26,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:34:26,218 INFO L225 Difference]: With dead ends: 3067 [2022-12-13 13:34:26,218 INFO L226 Difference]: Without dead ends: 3056 [2022-12-13 13:34:26,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 3 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=329, Invalid=1747, Unknown=6, NotChecked=270, Total=2352 [2022-12-13 13:34:26,219 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 853 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:34:26,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 1908 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1647 Invalid, 0 Unknown, 184 Unchecked, 4.7s Time] [2022-12-13 13:34:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2022-12-13 13:34:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2952. [2022-12-13 13:34:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2770 states have (on average 1.4646209386281588) internal successors, (4057), 2852 states have internal predecessors, (4057), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:34:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 4301 transitions. [2022-12-13 13:34:26,245 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 4301 transitions. Word has length 53 [2022-12-13 13:34:26,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:34:26,245 INFO L495 AbstractCegarLoop]: Abstraction has 2952 states and 4301 transitions. [2022-12-13 13:34:26,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:34:26,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 4301 transitions. [2022-12-13 13:34:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 13:34:26,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:34:26,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:26,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-12-13 13:34:26,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-12-13 13:34:26,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt [2022-12-13 13:34:26,647 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:34:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1294590430, now seen corresponding path program 1 times [2022-12-13 13:34:26,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:34:26,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655704349] [2022-12-13 13:34:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:26,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:26,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:34:26,653 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:34:26,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-12-13 13:34:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 13:34:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:27,306 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 15 treesize of output 11 [2022-12-13 13:34:27,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2022-12-13 13:34:27,596 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~cursor~1#1.base_20| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~cursor~1#1.base_20| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~cursor~1#1.base_20|)))) is different from true [2022-12-13 13:34:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 13:34:27,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:27,844 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 50 treesize of output 42 [2022-12-13 13:34:39,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:34:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655704349] [2022-12-13 13:34:39,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655704349] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672439568] [2022-12-13 13:34:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:39,106 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-13 13:34:39,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 [2022-12-13 13:34:39,106 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-13 13:34:39,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-13 13:34:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:39,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 13:34:39,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:40,462 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 15 treesize of output 11 [2022-12-13 13:34:40,783 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 33 treesize of output 15 [2022-12-13 13:34:41,009 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~cursor~1#1.base_22| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~cursor~1#1.base_22| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~cursor~1#1.base_22|)))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-12-13 13:34:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 13:34:41,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:41,092 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 50 treesize of output 42 [2022-12-13 13:34:51,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [672439568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:51,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:34:51,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 13:34:51,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967771153] [2022-12-13 13:34:51,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:51,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 13:34:51,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:34:51,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 13:34:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=8, NotChecked=114, Total=992 [2022-12-13 13:34:51,770 INFO L87 Difference]: Start difference. First operand 2952 states and 4301 transitions. Second operand has 23 states, 22 states have (on average 4.636363636363637) internal successors, (102), 23 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:34:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:34:55,730 INFO L93 Difference]: Finished difference Result 3059 states and 4431 transitions. [2022-12-13 13:34:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:34:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.636363636363637) internal successors, (102), 23 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-12-13 13:34:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:34:55,734 INFO L225 Difference]: With dead ends: 3059 [2022-12-13 13:34:55,734 INFO L226 Difference]: Without dead ends: 3046 [2022-12-13 13:34:55,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 3 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=8, NotChecked=150, Total=1640 [2022-12-13 13:34:55,735 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 995 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:34:55,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 1050 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 868 Invalid, 1 Unknown, 472 Unchecked, 2.4s Time] [2022-12-13 13:34:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-12-13 13:34:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2950. [2022-12-13 13:34:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2768 states have (on average 1.4645953757225434) internal successors, (4054), 2850 states have internal predecessors, (4054), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:34:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 4298 transitions. [2022-12-13 13:34:55,759 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 4298 transitions. Word has length 53 [2022-12-13 13:34:55,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:34:55,759 INFO L495 AbstractCegarLoop]: Abstraction has 2950 states and 4298 transitions. [2022-12-13 13:34:55,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.636363636363637) internal successors, (102), 23 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:34:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 4298 transitions. [2022-12-13 13:34:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 13:34:55,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:34:55,759 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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 13:34:55,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-12-13 13:34:55,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-12-13 13:34:56,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt [2022-12-13 13:34:56,160 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:34:56,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:56,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1564974845, now seen corresponding path program 1 times [2022-12-13 13:34:56,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:34:56,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515145928] [2022-12-13 13:34:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:56,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:56,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:34:56,162 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:34:56,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-12-13 13:34:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:56,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:34:56,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:34:56,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:34:56,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:34:56,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515145928] [2022-12-13 13:34:56,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515145928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:56,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:56,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:34:56,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927184113] [2022-12-13 13:34:56,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:56,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:34:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:34:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:34:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:34:56,555 INFO L87 Difference]: Start difference. First operand 2950 states and 4298 transitions. Second operand has 7 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 13:34:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:34:57,345 INFO L93 Difference]: Finished difference Result 4288 states and 6180 transitions. [2022-12-13 13:34:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:34:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-12-13 13:34:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:34:57,351 INFO L225 Difference]: With dead ends: 4288 [2022-12-13 13:34:57,351 INFO L226 Difference]: Without dead ends: 4288 [2022-12-13 13:34:57,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:34:57,351 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 433 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:34:57,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 898 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 13:34:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2022-12-13 13:34:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 2948. [2022-12-13 13:34:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2768 states have (on average 1.4573699421965318) internal successors, (4034), 2848 states have internal predecessors, (4034), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:34:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 4278 transitions. [2022-12-13 13:34:57,385 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 4278 transitions. Word has length 55 [2022-12-13 13:34:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:34:57,385 INFO L495 AbstractCegarLoop]: Abstraction has 2948 states and 4278 transitions. [2022-12-13 13:34:57,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 13:34:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 4278 transitions. [2022-12-13 13:34:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 13:34:57,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:34:57,385 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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 13:34:57,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-12-13 13:34:57,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:57,586 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:34:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1757859256, now seen corresponding path program 1 times [2022-12-13 13:34:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:34:57,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608499751] [2022-12-13 13:34:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:57,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:57,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:34:57,587 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:34:57,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-13 13:34:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 13:34:57,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:58,200 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 15 treesize of output 11 [2022-12-13 13:34:58,362 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 20 treesize of output 8 [2022-12-13 13:34:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:58,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:34:58,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:34:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608499751] [2022-12-13 13:34:58,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608499751] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:58,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:58,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 13:34:58,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893360729] [2022-12-13 13:34:58,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:58,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:34:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:34:58,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:34:58,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:34:58,513 INFO L87 Difference]: Start difference. First operand 2948 states and 4278 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:35:02,458 INFO L93 Difference]: Finished difference Result 6367 states and 9096 transitions. [2022-12-13 13:35:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 13:35:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-12-13 13:35:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:35:02,466 INFO L225 Difference]: With dead ends: 6367 [2022-12-13 13:35:02,466 INFO L226 Difference]: Without dead ends: 6367 [2022-12-13 13:35:02,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 13:35:02,466 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1704 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 2367 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:35:02,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 2367 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-13 13:35:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2022-12-13 13:35:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 2966. [2022-12-13 13:35:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2786 states have (on average 1.4529791816223978) internal successors, (4048), 2866 states have internal predecessors, (4048), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:35:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 4292 transitions. [2022-12-13 13:35:02,503 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 4292 transitions. Word has length 55 [2022-12-13 13:35:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:35:02,503 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 4292 transitions. [2022-12-13 13:35:02,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 4292 transitions. [2022-12-13 13:35:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 13:35:02,503 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:35:02,504 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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 13:35:02,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-12-13 13:35:02,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:02,705 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:35:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1269557265, now seen corresponding path program 1 times [2022-12-13 13:35:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:02,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53231197] [2022-12-13 13:35:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:02,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:02,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:02,711 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:02,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-12-13 13:35:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:03,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 13:35:03,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:03,467 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 15 treesize of output 11 [2022-12-13 13:35:03,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:03,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:35:03,723 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-12-13 13:35:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:03,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:35:03,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:03,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53231197] [2022-12-13 13:35:03,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53231197] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:35:03,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:35:03,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 13:35:03,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108040695] [2022-12-13 13:35:03,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:03,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:35:03,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:03,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:35:03,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:35:03,744 INFO L87 Difference]: Start difference. First operand 2966 states and 4292 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:06,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:35:06,030 INFO L93 Difference]: Finished difference Result 3988 states and 5711 transitions. [2022-12-13 13:35:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:35:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-12-13 13:35:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:35:06,034 INFO L225 Difference]: With dead ends: 3988 [2022-12-13 13:35:06,034 INFO L226 Difference]: Without dead ends: 3988 [2022-12-13 13:35:06,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2022-12-13 13:35:06,035 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 990 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:35:06,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 1467 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 13:35:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2022-12-13 13:35:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 2966. [2022-12-13 13:35:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2786 states have (on average 1.4493898061737258) internal successors, (4038), 2866 states have internal predecessors, (4038), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:35:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 4282 transitions. [2022-12-13 13:35:06,060 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 4282 transitions. Word has length 56 [2022-12-13 13:35:06,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:35:06,060 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 4282 transitions. [2022-12-13 13:35:06,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 4282 transitions. [2022-12-13 13:35:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 13:35:06,064 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:35:06,064 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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 13:35:06,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-12-13 13:35:06,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:06,266 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:35:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash 701569788, now seen corresponding path program 1 times [2022-12-13 13:35:06,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:06,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142879822] [2022-12-13 13:35:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:06,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:06,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:06,271 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:06,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-12-13 13:35:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:35:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:07,175 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 15 treesize of output 11 [2022-12-13 13:35:07,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:07,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:35:07,600 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 14 [2022-12-13 13:35:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:07,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:35:07,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142879822] [2022-12-13 13:35:07,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142879822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:35:07,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:35:07,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 13:35:07,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759222837] [2022-12-13 13:35:07,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:07,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:35:07,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:35:07,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:35:07,649 INFO L87 Difference]: Start difference. First operand 2966 states and 4282 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:35:10,617 INFO L93 Difference]: Finished difference Result 3957 states and 5663 transitions. [2022-12-13 13:35:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 13:35:10,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-12-13 13:35:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:35:10,622 INFO L225 Difference]: With dead ends: 3957 [2022-12-13 13:35:10,622 INFO L226 Difference]: Without dead ends: 3957 [2022-12-13 13:35:10,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:35:10,623 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 994 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 13:35:10,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 1221 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 13:35:10,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2022-12-13 13:35:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 2966. [2022-12-13 13:35:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2786 states have (on average 1.4458004307250538) internal successors, (4028), 2866 states have internal predecessors, (4028), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:35:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 4272 transitions. [2022-12-13 13:35:10,648 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 4272 transitions. Word has length 57 [2022-12-13 13:35:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:35:10,649 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 4272 transitions. [2022-12-13 13:35:10,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 4272 transitions. [2022-12-13 13:35:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 13:35:10,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:35:10,649 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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 13:35:10,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-12-13 13:35:10,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:10,850 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:35:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash 702277789, now seen corresponding path program 1 times [2022-12-13 13:35:10,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:10,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793994990] [2022-12-13 13:35:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:10,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:10,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:10,853 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:10,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-12-13 13:35:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:11,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 13:35:11,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:11,679 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 15 treesize of output 11 [2022-12-13 13:35:11,691 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 15 treesize of output 11 [2022-12-13 13:35:11,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:11,786 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 23 treesize of output 23 [2022-12-13 13:35:11,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:11,795 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 35 treesize of output 26 [2022-12-13 13:35:12,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:12,309 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-12-13 13:35:12,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:12,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:35:12,318 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 13 [2022-12-13 13:35:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:12,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:35:12,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:12,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793994990] [2022-12-13 13:35:12,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793994990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:35:12,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:35:12,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 13:35:12,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401059264] [2022-12-13 13:35:12,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:12,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:35:12,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:35:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:35:12,366 INFO L87 Difference]: Start difference. First operand 2966 states and 4272 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:35:16,143 INFO L93 Difference]: Finished difference Result 3709 states and 5271 transitions. [2022-12-13 13:35:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 13:35:16,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-12-13 13:35:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:35:16,148 INFO L225 Difference]: With dead ends: 3709 [2022-12-13 13:35:16,148 INFO L226 Difference]: Without dead ends: 3709 [2022-12-13 13:35:16,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 13:35:16,148 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 1061 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:35:16,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1062 Valid, 1711 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-13 13:35:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2022-12-13 13:35:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 2966. [2022-12-13 13:35:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2786 states have (on average 1.4422110552763818) internal successors, (4018), 2866 states have internal predecessors, (4018), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:35:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 4262 transitions. [2022-12-13 13:35:16,174 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 4262 transitions. Word has length 57 [2022-12-13 13:35:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:35:16,174 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 4262 transitions. [2022-12-13 13:35:16,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 4262 transitions. [2022-12-13 13:35:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 13:35:16,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:35:16,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:35:16,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-12-13 13:35:16,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:16,375 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:35:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1307208983, now seen corresponding path program 1 times [2022-12-13 13:35:16,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:16,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653503363] [2022-12-13 13:35:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:16,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:16,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:16,377 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:16,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-12-13 13:35:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:35:16,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:16,559 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 19 treesize of output 11 [2022-12-13 13:35:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 13:35:16,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:35:16,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:16,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653503363] [2022-12-13 13:35:16,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653503363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:35:16,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:35:16,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:35:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587908650] [2022-12-13 13:35:16,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:16,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:35:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:35:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:35:16,593 INFO L87 Difference]: Start difference. First operand 2966 states and 4262 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:35:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:35:17,494 INFO L93 Difference]: Finished difference Result 3310 states and 4769 transitions. [2022-12-13 13:35:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:35:17,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-12-13 13:35:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:35:17,498 INFO L225 Difference]: With dead ends: 3310 [2022-12-13 13:35:17,498 INFO L226 Difference]: Without dead ends: 3310 [2022-12-13 13:35:17,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:35:17,498 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 131 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:35:17,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 562 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 13:35:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2022-12-13 13:35:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2962. [2022-12-13 13:35:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2786 states have (on average 1.4249820531227566) internal successors, (3970), 2862 states have internal predecessors, (3970), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:35:17,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4214 transitions. [2022-12-13 13:35:17,526 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4214 transitions. Word has length 57 [2022-12-13 13:35:17,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:35:17,527 INFO L495 AbstractCegarLoop]: Abstraction has 2962 states and 4214 transitions. [2022-12-13 13:35:17,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:35:17,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4214 transitions. [2022-12-13 13:35:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 13:35:17,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:35:17,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:35:17,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-12-13 13:35:17,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:17,728 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:35:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:17,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1307208982, now seen corresponding path program 1 times [2022-12-13 13:35:17,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:17,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368520798] [2022-12-13 13:35:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:17,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:17,733 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:17,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-12-13 13:35:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:18,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 13:35:18,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:18,176 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 46 treesize of output 30 [2022-12-13 13:35:18,188 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 22 treesize of output 14 [2022-12-13 13:35:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 13:35:18,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:35:18,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:35:18,538 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 51 treesize of output 55 [2022-12-13 13:35:18,785 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 43 treesize of output 27 [2022-12-13 13:35:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 13:35:18,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:18,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368520798] [2022-12-13 13:35:18,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368520798] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 13:35:18,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:35:18,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-12-13 13:35:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312025268] [2022-12-13 13:35:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:35:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:35:18,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:35:18,794 INFO L87 Difference]: Start difference. First operand 2962 states and 4214 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:35:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:35:20,587 INFO L93 Difference]: Finished difference Result 2957 states and 4166 transitions. [2022-12-13 13:35:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:35:20,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-12-13 13:35:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:35:20,591 INFO L225 Difference]: With dead ends: 2957 [2022-12-13 13:35:20,591 INFO L226 Difference]: Without dead ends: 2957 [2022-12-13 13:35:20,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:35:20,591 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 135 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:35:20,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 511 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 13:35:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-12-13 13:35:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2949. [2022-12-13 13:35:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2778 states have (on average 1.4089272858171347) internal successors, (3914), 2849 states have internal predecessors, (3914), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:35:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4158 transitions. [2022-12-13 13:35:20,617 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4158 transitions. Word has length 57 [2022-12-13 13:35:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:35:20,617 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 4158 transitions. [2022-12-13 13:35:20,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:35:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4158 transitions. [2022-12-13 13:35:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 13:35:20,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:35:20,617 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 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 13:35:20,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-12-13 13:35:20,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:20,818 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:35:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash 273827187, now seen corresponding path program 1 times [2022-12-13 13:35:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:20,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674905577] [2022-12-13 13:35:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:20,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:20,824 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:20,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-12-13 13:35:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:21,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 13:35:21,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:21,067 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 7 [2022-12-13 13:35:21,494 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 15 treesize of output 11 [2022-12-13 13:35:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:21,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:35:21,802 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 14 [2022-12-13 13:35:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:21,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:35:21,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674905577] [2022-12-13 13:35:21,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674905577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:35:21,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:35:21,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 13:35:21,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593788940] [2022-12-13 13:35:21,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:21,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:35:21,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:35:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:35:21,830 INFO L87 Difference]: Start difference. First operand 2949 states and 4158 transitions. Second operand has 13 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:24,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:35:24,965 INFO L93 Difference]: Finished difference Result 4038 states and 5648 transitions. [2022-12-13 13:35:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 13:35:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-12-13 13:35:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:35:24,970 INFO L225 Difference]: With dead ends: 4038 [2022-12-13 13:35:24,970 INFO L226 Difference]: Without dead ends: 4038 [2022-12-13 13:35:24,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2022-12-13 13:35:24,971 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 778 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:35:24,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 1373 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-13 13:35:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2022-12-13 13:35:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 2991. [2022-12-13 13:35:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2820 states have (on average 1.4088652482269504) internal successors, (3973), 2891 states have internal predecessors, (3973), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:35:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 4217 transitions. [2022-12-13 13:35:25,011 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 4217 transitions. Word has length 58 [2022-12-13 13:35:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:35:25,011 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 4217 transitions. [2022-12-13 13:35:25,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:35:25,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 4217 transitions. [2022-12-13 13:35:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 13:35:25,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:35:25,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-12-13 13:35:25,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-12-13 13:35:25,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:25,212 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:35:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1913627976, now seen corresponding path program 1 times [2022-12-13 13:35:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:25,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271921891] [2022-12-13 13:35:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:25,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:25,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:25,215 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:25,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-12-13 13:35:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:25,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:35:25,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:25,429 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 19 treesize of output 11 [2022-12-13 13:35:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 13:35:25,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:35:25,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:25,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271921891] [2022-12-13 13:35:25,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271921891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:35:25,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:35:25,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:35:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44161165] [2022-12-13 13:35:25,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:25,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:35:25,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:35:25,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:35:25,462 INFO L87 Difference]: Start difference. First operand 2991 states and 4217 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:35:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:35:26,435 INFO L93 Difference]: Finished difference Result 4667 states and 6567 transitions. [2022-12-13 13:35:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:35:26,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-12-13 13:35:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:35:26,440 INFO L225 Difference]: With dead ends: 4667 [2022-12-13 13:35:26,440 INFO L226 Difference]: Without dead ends: 4667 [2022-12-13 13:35:26,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:35:26,440 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 111 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 13:35:26,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 711 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 13:35:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2022-12-13 13:35:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 2989. [2022-12-13 13:35:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2820 states have (on average 1.397517730496454) internal successors, (3941), 2889 states have internal predecessors, (3941), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 83 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:35:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 4185 transitions. [2022-12-13 13:35:26,483 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 4185 transitions. Word has length 58 [2022-12-13 13:35:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:35:26,484 INFO L495 AbstractCegarLoop]: Abstraction has 2989 states and 4185 transitions. [2022-12-13 13:35:26,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:35:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 4185 transitions. [2022-12-13 13:35:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 13:35:26,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:35:26,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-12-13 13:35:26,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-12-13 13:35:26,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:26,686 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:35:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1913627975, now seen corresponding path program 1 times [2022-12-13 13:35:26,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:26,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104002033] [2022-12-13 13:35:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:26,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:26,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:26,691 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:26,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-12-13 13:35:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:26,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 13:35:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:27,314 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 15 treesize of output 11 [2022-12-13 13:35:27,383 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 13:35:27,384 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 26 [2022-12-13 13:35:27,755 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 26 treesize of output 18 [2022-12-13 13:35:27,760 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 29 treesize of output 17 [2022-12-13 13:35:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:27,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:35:28,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:35:28,310 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 51 treesize of output 55 [2022-12-13 13:35:30,264 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 154 treesize of output 138 [2022-12-13 13:35:30,457 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 150 treesize of output 134 [2022-12-13 13:35:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:35:32,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:32,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104002033] [2022-12-13 13:35:32,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104002033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:35:32,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:35:32,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2022-12-13 13:35:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665459320] [2022-12-13 13:35:32,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:35:32,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 13:35:32,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 13:35:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-12-13 13:35:32,651 INFO L87 Difference]: Start difference. First operand 2989 states and 4185 transitions. Second operand has 32 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 29 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 13:35:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:35:58,431 INFO L93 Difference]: Finished difference Result 9110 states and 12841 transitions. [2022-12-13 13:35:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-13 13:35:58,432 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 29 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2022-12-13 13:35:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:35:58,438 INFO L225 Difference]: With dead ends: 9110 [2022-12-13 13:35:58,438 INFO L226 Difference]: Without dead ends: 9110 [2022-12-13 13:35:58,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=1324, Invalid=7048, Unknown=0, NotChecked=0, Total=8372 [2022-12-13 13:35:58,439 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 4632 mSDsluCounter, 3506 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4633 SdHoareTripleChecker+Valid, 3781 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:35:58,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4633 Valid, 3781 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2022-12-13 13:35:58,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9110 states. [2022-12-13 13:35:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9110 to 3074. [2022-12-13 13:35:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 2906 states have (on average 1.3898830006882312) internal successors, (4039), 2971 states have internal predecessors, (4039), 122 states have call successors, (122), 16 states have call predecessors, (122), 16 states have return successors, (122), 86 states have call predecessors, (122), 122 states have call successors, (122) [2022-12-13 13:35:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 4283 transitions. [2022-12-13 13:35:58,488 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 4283 transitions. Word has length 58 [2022-12-13 13:35:58,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:35:58,488 INFO L495 AbstractCegarLoop]: Abstraction has 3074 states and 4283 transitions. [2022-12-13 13:35:58,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 29 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 13:35:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 4283 transitions. [2022-12-13 13:35:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 13:35:58,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:35:58,489 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 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 13:35:58,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-12-13 13:35:58,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:58,690 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:35:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:58,691 INFO L85 PathProgramCache]: Analyzing trace with hash -101291554, now seen corresponding path program 1 times [2022-12-13 13:35:58,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:58,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825681079] [2022-12-13 13:35:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:58,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:58,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:58,696 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:58,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-12-13 13:35:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:58,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 13:35:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:58,982 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 7 [2022-12-13 13:35:59,511 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 15 treesize of output 11 [2022-12-13 13:35:59,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:35:59,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:35:59,721 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 21 treesize of output 15 [2022-12-13 13:35:59,892 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 15 treesize of output 11 [2022-12-13 13:36:00,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:00,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-12-13 13:36:00,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:36:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:00,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:36:01,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:36:01,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825681079] [2022-12-13 13:36:01,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825681079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:36:01,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [12734941] [2022-12-13 13:36:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:01,025 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-13 13:36:01,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 [2022-12-13 13:36:01,026 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-13 13:36:01,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-12-13 13:36:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 13:36:01,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:01,568 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:36:01,569 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 13 treesize of output 13 [2022-12-13 13:36:02,569 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 15 treesize of output 11 [2022-12-13 13:36:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:02,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-12-13 13:36:02,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:36:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:02,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:36:02,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [12734941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:36:02,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:36:02,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [18] total 24 [2022-12-13 13:36:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395136108] [2022-12-13 13:36:02,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:36:02,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:36:02,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:36:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:36:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 13:36:02,884 INFO L87 Difference]: Start difference. First operand 3074 states and 4283 transitions. Second operand has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:36:12,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:36:12,664 INFO L93 Difference]: Finished difference Result 10016 states and 13836 transitions. [2022-12-13 13:36:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 13:36:12,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-12-13 13:36:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:36:12,673 INFO L225 Difference]: With dead ends: 10016 [2022-12-13 13:36:12,673 INFO L226 Difference]: Without dead ends: 10016 [2022-12-13 13:36:12,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1114, Invalid=4142, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 13:36:12,674 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 2114 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2116 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:36:12,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2116 Valid, 2563 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-13 13:36:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2022-12-13 13:36:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 5992. [2022-12-13 13:36:12,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5992 states, 5652 states have (on average 1.3720806794055203) internal successors, (7755), 5760 states have internal predecessors, (7755), 275 states have call successors, (275), 35 states have call predecessors, (275), 35 states have return successors, (275), 196 states have call predecessors, (275), 275 states have call successors, (275) [2022-12-13 13:36:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 8305 transitions. [2022-12-13 13:36:12,786 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 8305 transitions. Word has length 59 [2022-12-13 13:36:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:36:12,786 INFO L495 AbstractCegarLoop]: Abstraction has 5992 states and 8305 transitions. [2022-12-13 13:36:12,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:36:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 8305 transitions. [2022-12-13 13:36:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 13:36:12,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:12,787 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 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 13:36:12,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-12-13 13:36:12,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-12-13 13:36:13,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt [2022-12-13 13:36:13,189 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:36:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:13,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1154929365, now seen corresponding path program 1 times [2022-12-13 13:36:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:36:13,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616662489] [2022-12-13 13:36:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:13,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:13,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:36:13,194 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:36:13,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-12-13 13:36:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:13,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:36:13,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:13,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:36:13,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:36:13,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616662489] [2022-12-13 13:36:13,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616662489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:36:13,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:36:13,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:36:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240553637] [2022-12-13 13:36:13,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:36:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:36:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:36:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:36:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:36:13,929 INFO L87 Difference]: Start difference. First operand 5992 states and 8305 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:36:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:36:15,033 INFO L93 Difference]: Finished difference Result 8568 states and 11864 transitions. [2022-12-13 13:36:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:36:15,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-12-13 13:36:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:36:15,045 INFO L225 Difference]: With dead ends: 8568 [2022-12-13 13:36:15,045 INFO L226 Difference]: Without dead ends: 8568 [2022-12-13 13:36:15,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:36:15,046 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 566 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:36:15,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 461 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 13:36:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8568 states. [2022-12-13 13:36:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8568 to 5991. [2022-12-13 13:36:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5991 states, 5652 states have (on average 1.3625265392781316) internal successors, (7701), 5759 states have internal predecessors, (7701), 275 states have call successors, (275), 35 states have call predecessors, (275), 35 states have return successors, (275), 196 states have call predecessors, (275), 275 states have call successors, (275) [2022-12-13 13:36:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5991 states to 5991 states and 8251 transitions. [2022-12-13 13:36:15,117 INFO L78 Accepts]: Start accepts. Automaton has 5991 states and 8251 transitions. Word has length 60 [2022-12-13 13:36:15,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:36:15,117 INFO L495 AbstractCegarLoop]: Abstraction has 5991 states and 8251 transitions. [2022-12-13 13:36:15,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:36:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 5991 states and 8251 transitions. [2022-12-13 13:36:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-13 13:36:15,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:36:15,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:15,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-12-13 13:36:15,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:15,319 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-13 13:36:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1243920337, now seen corresponding path program 1 times [2022-12-13 13:36:15,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:36:15,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316356546] [2022-12-13 13:36:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:15,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:15,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:36:15,325 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:36:15,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-12-13 13:36:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 13:36:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:16,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:36:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:16,554 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-12-13 13:36:16,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:36:16,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:16,599 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-12-13 13:36:16,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:16,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:36:16,783 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 13:36:16,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2022-12-13 13:36:16,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:16,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:36:16,826 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 13:36:16,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-12-13 13:36:17,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:17,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:17,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:17,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:36:17,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-12-13 13:36:17,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:17,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:17,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:36:17,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-12-13 13:36:17,337 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-12-13 13:36:17,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 31 treesize of output 43 [2022-12-13 13:36:17,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-13 13:36:17,355 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 7 treesize of output 3 [2022-12-13 13:36:17,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:17,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:36:17,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 31 [2022-12-13 13:36:17,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:36:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:17,948 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-13 13:36:17,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 75 treesize of output 48 [2022-12-13 13:36:17,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:17,962 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 33 treesize of output 32 [2022-12-13 13:36:18,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:18,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:18,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 46 [2022-12-13 13:36:18,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:18,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:36:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:18,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:36:18,173 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-13 13:36:18,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 67 treesize of output 59 [2022-12-13 13:36:19,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:36:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:19,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:36:19,090 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 13:36:19,090 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 46 [2022-12-13 13:36:19,100 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-13 13:36:19,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-12-13 13:36:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:19,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:38:50,313 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:38:55,849 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (bvmul (_ bv4 32) ~unnamed2~0~ITEM_NEXT)) (.cse17 (bvmul (_ bv4 32) ~unnamed1~0~LIST_BEG))) (let ((.cse2 (bvadd .cse17 |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse3 (bvadd |c_ULTIMATE.start_append_one_~list#1.offset| (bvmul (_ bv4 32) ~unnamed1~0~LIST_END))) (.cse8 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|)) (.cse4 (bvadd |c_~#list~0.offset| .cse17)) (.cse7 (bvadd |c_ULTIMATE.start_create_item_~item~0#1.offset| .cse5)) (.cse12 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|)) (.cse9 (bvadd (bvmul (_ bv4 32) ~unnamed2~0~ITEM_PREV) |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse10 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (forall ((v_ArrVal_1763 (_ BitVec 32)) (v_ArrVal_1762 (_ BitVec 32)) (|ULTIMATE.start_create_item_~item~0#1.base| (_ BitVec 32)) (v_ArrVal_1761 (_ BitVec 32))) (let ((.cse1 (let ((.cse11 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_create_item_~item~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_create_item_~item~0#1.base|) .cse7 .cse12) .cse9 v_ArrVal_1761) .cse10 v_ArrVal_1763)))) (store .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |ULTIMATE.start_create_item_~item~0#1.base|))))) (or (forall ((v_ArrVal_1774 (_ BitVec 32)) (v_ArrVal_1776 (_ BitVec 32)) (v_ArrVal_1764 (_ BitVec 32)) (v_ArrVal_1769 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (let ((.cse6 (store (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~item~0#1.base| (store (store (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~item~0#1.base|) .cse7 .cse8) .cse9 v_ArrVal_1762) .cse10 v_ArrVal_1764)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1769))) (store .cse6 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse6 |c_ULTIMATE.start_append_one_~list#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse3 v_ArrVal_1776))))) (select (select .cse0 (select (select (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) .cse2 |ULTIMATE.start_create_item_~item~0#1.base|) .cse3 v_ArrVal_1774)) |c_~#list~0.base|) .cse4)) (bvadd (select (select .cse0 |c_~#list~0.base|) .cse4) .cse5))) (_ bv0 32))) (not (= (select (select .cse1 |ULTIMATE.start_create_item_~item~0#1.base|) .cse9) (_ bv0 32)))))) (forall ((v_ArrVal_1763 (_ BitVec 32)) (v_ArrVal_1762 (_ BitVec 32)) (|ULTIMATE.start_create_item_~item~0#1.base| (_ BitVec 32)) (v_ArrVal_1761 (_ BitVec 32))) (let ((.cse14 (let ((.cse16 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_create_item_~item~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_create_item_~item~0#1.base|) .cse7 .cse12) .cse9 v_ArrVal_1761) .cse10 v_ArrVal_1763)))) (store .cse16 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse16 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |ULTIMATE.start_create_item_~item~0#1.base|))))) (or (forall ((v_ArrVal_1774 (_ BitVec 32)) (v_ArrVal_1776 (_ BitVec 32)) (v_ArrVal_1764 (_ BitVec 32)) (v_ArrVal_1769 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (let ((.cse13 (store .cse14 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse14 |c_ULTIMATE.start_append_one_~list#1.base|) .cse2 |ULTIMATE.start_create_item_~item~0#1.base|) .cse3 v_ArrVal_1774)))) (select .cse13 (select (select .cse13 |c_~#list~0.base|) .cse4))) (bvadd (select (select (let ((.cse15 (store (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~item~0#1.base| (store (store (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~item~0#1.base|) .cse7 .cse8) .cse9 v_ArrVal_1762) .cse10 v_ArrVal_1764)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1769))) (store .cse15 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse15 |c_ULTIMATE.start_append_one_~list#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse3 v_ArrVal_1776))) |c_~#list~0.base|) .cse4) .cse5)) (_ bv0 32))) (not (= (select (select .cse14 |ULTIMATE.start_create_item_~item~0#1.base|) .cse9) (_ bv0 32))))))))) is different from false [2022-12-13 13:38:56,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:38:56,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:38:56,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:38:56,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 114 [2022-12-13 13:38:57,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:39:42,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:39:42,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316356546] [2022-12-13 13:39:42,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316356546] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:39:42,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [333375482] [2022-12-13 13:39:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:39:42,299 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-13 13:39:42,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 [2022-12-13 13:39:42,300 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-13 13:39:42,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d041dd-afe8-4234-a0ad-b1b1cbf5f7e6/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-12-13 13:39:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:39:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-13 13:39:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:39:46,790 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:39:46,790 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 13 treesize of output 13