./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8 --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 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 --- 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-e04fb08 [2022-11-16 12:40:14,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:40:14,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:40:14,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:40:14,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:40:14,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:40:14,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:40:14,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:40:14,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:40:14,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:40:14,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:40:14,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:40:14,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:40:14,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:40:14,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:40:14,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:40:14,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:40:14,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:40:14,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:40:14,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:40:14,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:40:14,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:40:14,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:40:14,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:40:14,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:40:14,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:40:14,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:40:14,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:40:14,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:40:14,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:40:14,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:40:14,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:40:14,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:40:14,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:40:14,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:40:14,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:40:14,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:40:14,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:40:14,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:40:14,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:40:14,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:40:14,981 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:40:15,018 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:40:15,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:40:15,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:40:15,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:40:15,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:40:15,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:40:15,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:40:15,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:40:15,023 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:40:15,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:40:15,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:40:15,024 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:40:15,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:40:15,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:40:15,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:40:15,025 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:40:15,025 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:40:15,025 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:40:15,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:40:15,026 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:40:15,026 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:40:15,026 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:40:15,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:40:15,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:40:15,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:40:15,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:40:15,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:40:15,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:40:15,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:40:15,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:40:15,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 [2022-11-16 12:40:15,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:40:15,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:40:15,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:40:15,381 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:40:15,382 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:40:15,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2022-11-16 12:40:15,460 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/data/7e5ad4b3c/ea71640ca7f140bdbc519f91a99926fd/FLAG45398a620 [2022-11-16 12:40:16,169 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:40:16,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2022-11-16 12:40:16,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/data/7e5ad4b3c/ea71640ca7f140bdbc519f91a99926fd/FLAG45398a620 [2022-11-16 12:40:16,450 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/data/7e5ad4b3c/ea71640ca7f140bdbc519f91a99926fd [2022-11-16 12:40:16,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:40:16,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:40:16,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:40:16,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:40:16,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:40:16,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:40:16" (1/1) ... [2022-11-16 12:40:16,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a0ee3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:16, skipping insertion in model container [2022-11-16 12:40:16,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:40:16" (1/1) ... [2022-11-16 12:40:16,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:40:16,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:40:16,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:40:16,960 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:40:17,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:40:17,027 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:40:17,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17 WrapperNode [2022-11-16 12:40:17,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:40:17,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:40:17,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:40:17,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:40:17,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,075 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-16 12:40:17,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:40:17,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:40:17,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:40:17,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:40:17,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,110 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:40:17,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:40:17,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:40:17,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:40:17,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (1/1) ... [2022-11-16 12:40:17,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:40:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:17,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:40:17,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:40:17,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:40:17,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:40:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:40:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:40:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:40:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:40:17,401 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:40:17,403 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:40:17,628 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:40:17,635 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:40:17,636 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:40:17,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:40:17 BoogieIcfgContainer [2022-11-16 12:40:17,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:40:17,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:40:17,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:40:17,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:40:17,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:40:16" (1/3) ... [2022-11-16 12:40:17,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c5ca38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:40:17, skipping insertion in model container [2022-11-16 12:40:17,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:17" (2/3) ... [2022-11-16 12:40:17,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c5ca38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:40:17, skipping insertion in model container [2022-11-16 12:40:17,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:40:17" (3/3) ... [2022-11-16 12:40:17,649 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2022-11-16 12:40:17,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:40:17,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-16 12:40:17,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:40:17,806 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71e3e9d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:40:17,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-16 12:40:17,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:40:17,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:17,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:17,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:17,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-11-16 12:40:17,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:17,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624031203] [2022-11-16 12:40:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:17,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:18,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624031203] [2022-11-16 12:40:18,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624031203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:18,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:18,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:40:18,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357137635] [2022-11-16 12:40:18,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:40:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:40:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:40:18,619 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:18,734 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-11-16 12:40:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:40:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:40:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:18,754 INFO L225 Difference]: With dead ends: 46 [2022-11-16 12:40:18,767 INFO L226 Difference]: Without dead ends: 42 [2022-11-16 12:40:18,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:40:18,773 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:18,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 56 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:40:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-16 12:40:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2022-11-16 12:40:18,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-16 12:40:18,854 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 7 [2022-11-16 12:40:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:18,855 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-16 12:40:18,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-16 12:40:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:40:18,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:18,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:18,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:40:18,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:18,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-11-16 12:40:18,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:18,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417528590] [2022-11-16 12:40:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:18,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:19,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417528590] [2022-11-16 12:40:19,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417528590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:19,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:19,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:40:19,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197093299] [2022-11-16 12:40:19,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:19,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:40:19,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:40:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:40:19,178 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:19,284 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-11-16 12:40:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:40:19,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:40:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:19,286 INFO L225 Difference]: With dead ends: 46 [2022-11-16 12:40:19,286 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 12:40:19,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:40:19,288 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:19,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 120 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:40:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 12:40:19,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 26. [2022-11-16 12:40:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-16 12:40:19,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 7 [2022-11-16 12:40:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:19,295 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-16 12:40:19,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-16 12:40:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:40:19,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:19,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:19,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:40:19,297 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:19,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1805088679, now seen corresponding path program 1 times [2022-11-16 12:40:19,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:19,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989433865] [2022-11-16 12:40:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:19,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:19,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:19,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989433865] [2022-11-16 12:40:19,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989433865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:19,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:19,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:40:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887918925] [2022-11-16 12:40:19,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:40:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:40:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:40:19,503 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:19,565 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-11-16 12:40:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:40:19,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:40:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:19,567 INFO L225 Difference]: With dead ends: 30 [2022-11-16 12:40:19,567 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 12:40:19,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:40:19,569 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:19,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 39 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:40:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 12:40:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-11-16 12:40:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-16 12:40:19,575 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2022-11-16 12:40:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:19,576 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-16 12:40:19,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-16 12:40:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:40:19,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:19,577 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:19,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:40:19,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:19,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2022-11-16 12:40:19,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:19,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574913737] [2022-11-16 12:40:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:19,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:19,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:19,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574913737] [2022-11-16 12:40:19,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574913737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:19,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546310697] [2022-11-16 12:40:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:19,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:19,657 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:19,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:40:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:40:19,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:19,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:40:19,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546310697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:19,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:40:19,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:40:19,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891652114] [2022-11-16 12:40:19,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:19,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:40:19,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:19,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:40:19,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:40:19,928 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:19,958 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-11-16 12:40:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:40:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:40:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:19,962 INFO L225 Difference]: With dead ends: 44 [2022-11-16 12:40:19,962 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 12:40:19,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:40:19,973 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:19,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 44 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:40:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 12:40:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2022-11-16 12:40:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-16 12:40:19,977 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2022-11-16 12:40:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:19,978 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-16 12:40:19,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-16 12:40:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:40:19,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:19,979 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:19,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:20,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:20,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1579537130, now seen corresponding path program 1 times [2022-11-16 12:40:20,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:20,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871018907] [2022-11-16 12:40:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:20,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:20,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:20,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871018907] [2022-11-16 12:40:20,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871018907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:20,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666976367] [2022-11-16 12:40:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:20,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:20,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:20,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:20,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:40:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:20,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:40:20,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:20,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:40:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:20,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:21,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666976367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:21,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:21,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-11-16 12:40:21,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633776646] [2022-11-16 12:40:21,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:21,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:40:21,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:21,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:40:21,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:40:21,243 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:21,491 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-11-16 12:40:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:40:21,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:40:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:21,493 INFO L225 Difference]: With dead ends: 32 [2022-11-16 12:40:21,493 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 12:40:21,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:40:21,494 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:21,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 70 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:40:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 12:40:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-11-16 12:40:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-16 12:40:21,500 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2022-11-16 12:40:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:21,500 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-16 12:40:21,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-16 12:40:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:40:21,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:21,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:21,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:21,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:21,710 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:21,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash -373722351, now seen corresponding path program 1 times [2022-11-16 12:40:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:21,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765529999] [2022-11-16 12:40:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:21,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:21,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765529999] [2022-11-16 12:40:21,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765529999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:21,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:21,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:40:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368628805] [2022-11-16 12:40:21,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:21,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:40:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:40:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:40:21,782 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:21,843 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-11-16 12:40:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:40:21,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:40:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:21,844 INFO L225 Difference]: With dead ends: 30 [2022-11-16 12:40:21,844 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 12:40:21,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:40:21,845 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:21,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 55 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:40:21,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 12:40:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-16 12:40:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-16 12:40:21,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2022-11-16 12:40:21,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:21,857 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-16 12:40:21,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-16 12:40:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:40:21,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:21,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:21,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:40:21,859 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:21,859 INFO L85 PathProgramCache]: Analyzing trace with hash -373722350, now seen corresponding path program 1 times [2022-11-16 12:40:21,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:21,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354275235] [2022-11-16 12:40:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:21,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:22,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354275235] [2022-11-16 12:40:22,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354275235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:22,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141076919] [2022-11-16 12:40:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:22,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:22,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:22,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:22,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:40:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:22,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:40:22,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:22,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:22,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-16 12:40:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:22,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141076919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:22,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:22,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-11-16 12:40:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127174792] [2022-11-16 12:40:22,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:22,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:40:22,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:40:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:40:22,272 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:22,526 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-16 12:40:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:40:22,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:40:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:22,527 INFO L225 Difference]: With dead ends: 34 [2022-11-16 12:40:22,527 INFO L226 Difference]: Without dead ends: 34 [2022-11-16 12:40:22,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:40:22,528 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:22,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 119 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:40:22,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-16 12:40:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-11-16 12:40:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-16 12:40:22,532 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2022-11-16 12:40:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:22,532 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-16 12:40:22,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-16 12:40:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:40:22,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:22,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:22,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:22,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:40:22,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:22,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1300245881, now seen corresponding path program 1 times [2022-11-16 12:40:22,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:22,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171071737] [2022-11-16 12:40:22,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:22,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:40:22,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:22,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171071737] [2022-11-16 12:40:22,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171071737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:22,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:22,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:40:22,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899182479] [2022-11-16 12:40:22,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:22,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:40:22,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:22,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:40:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:40:22,863 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:22,900 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-11-16 12:40:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:40:22,901 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:40:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:22,901 INFO L225 Difference]: With dead ends: 49 [2022-11-16 12:40:22,902 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 12:40:22,902 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 [2022-11-16 12:40:22,903 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:22,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 68 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:40:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 12:40:22,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2022-11-16 12:40:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-11-16 12:40:22,921 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 15 [2022-11-16 12:40:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:22,921 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-11-16 12:40:22,921 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-11-16 12:40:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:40:22,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:22,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:22,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:40:22,923 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:22,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1558411319, now seen corresponding path program 1 times [2022-11-16 12:40:22,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:22,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776399400] [2022-11-16 12:40:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:22,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:40:23,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:23,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776399400] [2022-11-16 12:40:23,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776399400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:23,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:23,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:40:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488341394] [2022-11-16 12:40:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:23,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:40:23,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:40:23,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:40:23,042 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:23,075 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-16 12:40:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:40:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:40:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:23,077 INFO L225 Difference]: With dead ends: 37 [2022-11-16 12:40:23,079 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 12:40:23,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:40:23,081 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:23,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 38 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:40:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 12:40:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-16 12:40:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:23,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-16 12:40:23,094 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2022-11-16 12:40:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:23,094 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-16 12:40:23,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-16 12:40:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:40:23,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:23,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:23,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:40:23,097 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1007310944, now seen corresponding path program 1 times [2022-11-16 12:40:23,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:23,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783001534] [2022-11-16 12:40:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:23,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:40:23,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:23,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783001534] [2022-11-16 12:40:23,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783001534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:23,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:23,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:40:23,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261371331] [2022-11-16 12:40:23,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:23,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:40:23,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:40:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:40:23,226 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:23,251 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-16 12:40:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:40:23,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:40:23,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:23,253 INFO L225 Difference]: With dead ends: 29 [2022-11-16 12:40:23,253 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 12:40:23,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:40:23,255 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:23,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:40:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 12:40:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-16 12:40:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-16 12:40:23,267 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2022-11-16 12:40:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:23,267 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-16 12:40:23,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-16 12:40:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:40:23,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:23,270 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:23,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:40:23,270 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:23,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1656754904, now seen corresponding path program 1 times [2022-11-16 12:40:23,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:23,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362041420] [2022-11-16 12:40:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:23,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:40:23,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362041420] [2022-11-16 12:40:23,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362041420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:23,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:23,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:40:23,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703114469] [2022-11-16 12:40:23,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:23,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:40:23,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:40:23,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:40:23,442 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:23,514 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-11-16 12:40:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:40:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:40:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:23,516 INFO L225 Difference]: With dead ends: 33 [2022-11-16 12:40:23,516 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 12:40:23,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:40:23,517 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:23,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 54 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:40:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 12:40:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-16 12:40:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-16 12:40:23,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2022-11-16 12:40:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:23,525 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-16 12:40:23,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-16 12:40:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:40:23,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:23,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:23,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:40:23,528 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1617144038, now seen corresponding path program 1 times [2022-11-16 12:40:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:23,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715182611] [2022-11-16 12:40:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:23,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:23,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:23,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715182611] [2022-11-16 12:40:23,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715182611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:23,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241092249] [2022-11-16 12:40:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:23,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:23,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:23,722 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:23,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:40:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:40:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:23,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:24,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241092249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:24,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:24,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-16 12:40:24,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312188797] [2022-11-16 12:40:24,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:24,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:40:24,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:40:24,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:40:24,091 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:24,249 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-11-16 12:40:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:40:24,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:40:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:24,251 INFO L225 Difference]: With dead ends: 34 [2022-11-16 12:40:24,251 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 12:40:24,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:40:24,252 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:24,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 94 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:40:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 12:40:24,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-11-16 12:40:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-11-16 12:40:24,254 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2022-11-16 12:40:24,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:24,255 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-11-16 12:40:24,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-11-16 12:40:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:40:24,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:24,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:24,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:24,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:40:24,462 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash -309577815, now seen corresponding path program 2 times [2022-11-16 12:40:24,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:24,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436463875] [2022-11-16 12:40:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:24,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:24,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:24,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436463875] [2022-11-16 12:40:24,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436463875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:24,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032364012] [2022-11-16 12:40:24,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:40:24,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:24,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:24,860 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:24,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:40:24,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:40:24,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:24,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:40:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:25,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:25,420 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 5 [2022-11-16 12:40:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:25,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032364012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:25,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:25,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-16 12:40:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019276816] [2022-11-16 12:40:25,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:25,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:40:25,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:25,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:40:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:40:25,465 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:25,920 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-11-16 12:40:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:40:25,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 12:40:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:25,922 INFO L225 Difference]: With dead ends: 31 [2022-11-16 12:40:25,922 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 12:40:25,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:40:25,924 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:25,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 101 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:40:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 12:40:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-16 12:40:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-16 12:40:25,927 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2022-11-16 12:40:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:25,927 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-16 12:40:25,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-16 12:40:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 12:40:25,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:25,928 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:25,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 12:40:26,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:26,144 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1540133135, now seen corresponding path program 3 times [2022-11-16 12:40:26,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:26,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166527614] [2022-11-16 12:40:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:26,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:26,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:26,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166527614] [2022-11-16 12:40:26,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166527614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:26,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299499330] [2022-11-16 12:40:26,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:40:26,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:26,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:26,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:26,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:40:26,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:40:26,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:40:26,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:26,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:26,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299499330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:26,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:26,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-16 12:40:26,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618528315] [2022-11-16 12:40:26,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:26,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:40:26,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:26,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:40:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:40:26,836 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:27,134 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-11-16 12:40:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:40:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-16 12:40:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:27,135 INFO L225 Difference]: With dead ends: 48 [2022-11-16 12:40:27,135 INFO L226 Difference]: Without dead ends: 36 [2022-11-16 12:40:27,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:40:27,137 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:27,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 207 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:40:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-16 12:40:27,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-11-16 12:40:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-11-16 12:40:27,140 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2022-11-16 12:40:27,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:27,140 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-11-16 12:40:27,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-11-16 12:40:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 12:40:27,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:27,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:27,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:27,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:27,343 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash 884722574, now seen corresponding path program 4 times [2022-11-16 12:40:27,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:27,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308829159] [2022-11-16 12:40:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:27,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308829159] [2022-11-16 12:40:27,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308829159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657718046] [2022-11-16 12:40:27,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:40:27,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:27,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:27,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:27,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:40:27,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:40:27,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:27,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:40:27,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:28,005 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 [2022-11-16 12:40:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:28,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:28,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657718046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:28,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:28,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-16 12:40:28,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881801057] [2022-11-16 12:40:28,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:28,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:40:28,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:28,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:40:28,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:40:28,696 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:29,300 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-11-16 12:40:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:40:29,302 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-16 12:40:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:29,303 INFO L225 Difference]: With dead ends: 40 [2022-11-16 12:40:29,303 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 12:40:29,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=1117, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:40:29,304 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 118 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:29,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 135 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:40:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 12:40:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-11-16 12:40:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-11-16 12:40:29,307 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2022-11-16 12:40:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:29,308 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-11-16 12:40:29,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-11-16 12:40:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 12:40:29,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:29,309 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:29,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:29,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:29,510 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:29,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash -510819796, now seen corresponding path program 5 times [2022-11-16 12:40:29,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:29,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496041912] [2022-11-16 12:40:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:29,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:29,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496041912] [2022-11-16 12:40:29,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496041912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:29,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808658350] [2022-11-16 12:40:29,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:40:29,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:29,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:29,867 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:29,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:40:30,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:40:30,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:30,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:40:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:30,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:30,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808658350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:30,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:30,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-16 12:40:30,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256738026] [2022-11-16 12:40:30,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:30,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:40:30,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:30,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:40:30,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:40:30,578 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:30,983 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-11-16 12:40:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:40:30,984 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-16 12:40:30,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:30,984 INFO L225 Difference]: With dead ends: 62 [2022-11-16 12:40:30,984 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 12:40:30,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:40:30,986 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:30,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 301 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:40:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 12:40:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-11-16 12:40:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-11-16 12:40:30,989 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2022-11-16 12:40:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:30,990 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-11-16 12:40:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-11-16 12:40:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 12:40:30,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:30,991 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:30,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:31,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:40:31,197 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1615395281, now seen corresponding path program 6 times [2022-11-16 12:40:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:31,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718589077] [2022-11-16 12:40:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:31,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:31,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:31,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718589077] [2022-11-16 12:40:31,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718589077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:31,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970106976] [2022-11-16 12:40:31,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:40:31,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:31,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:31,796 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:31,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:40:31,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 12:40:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:31,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 12:40:31,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:32,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:32,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 12:40:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:32,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970106976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:32,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:32,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-11-16 12:40:32,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563412647] [2022-11-16 12:40:32,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:32,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:40:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:32,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:40:32,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:40:32,937 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:33,601 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-11-16 12:40:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:40:33,607 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-16 12:40:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:33,609 INFO L225 Difference]: With dead ends: 49 [2022-11-16 12:40:33,609 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 12:40:33,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=395, Invalid=1411, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:40:33,612 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:33,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 208 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:40:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 12:40:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-11-16 12:40:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-11-16 12:40:33,637 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2022-11-16 12:40:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:33,637 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-11-16 12:40:33,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-11-16 12:40:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 12:40:33,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:33,638 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:33,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 12:40:33,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:40:33,844 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:33,845 INFO L85 PathProgramCache]: Analyzing trace with hash 658687019, now seen corresponding path program 7 times [2022-11-16 12:40:33,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:33,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589558213] [2022-11-16 12:40:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:33,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:34,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:34,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589558213] [2022-11-16 12:40:34,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589558213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:34,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658398456] [2022-11-16 12:40:34,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:40:34,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:34,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:34,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:34,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:40:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:34,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:40:34,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:34,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:35,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658398456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:35,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:35,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-11-16 12:40:35,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659343728] [2022-11-16 12:40:35,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:35,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:40:35,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:40:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:40:35,290 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:35,735 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-11-16 12:40:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:40:35,735 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-16 12:40:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:35,736 INFO L225 Difference]: With dead ends: 76 [2022-11-16 12:40:35,736 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 12:40:35,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:40:35,737 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:35,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 406 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:40:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 12:40:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-11-16 12:40:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-11-16 12:40:35,740 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2022-11-16 12:40:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:35,740 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-11-16 12:40:35,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:35,741 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-11-16 12:40:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 12:40:35,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:35,742 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:35,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:35,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:40:35,947 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash 40506248, now seen corresponding path program 8 times [2022-11-16 12:40:35,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:35,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879748804] [2022-11-16 12:40:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:35,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:36,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:36,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879748804] [2022-11-16 12:40:36,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879748804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:36,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690297095] [2022-11-16 12:40:36,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:40:36,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:36,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:36,726 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:36,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:40:36,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:40:36,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 12:40:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:37,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:37,615 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 5 [2022-11-16 12:40:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:37,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690297095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:37,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:37,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 12:40:37,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80165768] [2022-11-16 12:40:37,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:37,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:40:37,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:37,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:40:37,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:40:37,754 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:38,460 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-11-16 12:40:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:40:38,461 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-16 12:40:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:38,461 INFO L225 Difference]: With dead ends: 58 [2022-11-16 12:40:38,461 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 12:40:38,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=427, Invalid=1735, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 12:40:38,463 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 236 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:38,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 280 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:40:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 12:40:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-11-16 12:40:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-11-16 12:40:38,465 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 50 [2022-11-16 12:40:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:38,465 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-11-16 12:40:38,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-11-16 12:40:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:40:38,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:38,466 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:38,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:38,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:38,672 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1129260658, now seen corresponding path program 9 times [2022-11-16 12:40:38,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:38,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412015319] [2022-11-16 12:40:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:38,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:39,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412015319] [2022-11-16 12:40:39,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412015319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778137846] [2022-11-16 12:40:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:40:39,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:39,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:39,133 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:39,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:40:39,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 12:40:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:39,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:40:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:39,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:40,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778137846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:40,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:40,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-11-16 12:40:40,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660853298] [2022-11-16 12:40:40,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:40,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:40:40,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:40,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:40:40,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:40:40,255 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:40,855 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-11-16 12:40:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:40:40,856 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 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 55 [2022-11-16 12:40:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:40,856 INFO L225 Difference]: With dead ends: 90 [2022-11-16 12:40:40,856 INFO L226 Difference]: Without dead ends: 63 [2022-11-16 12:40:40,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:40:40,857 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 100 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:40,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 558 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:40:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-16 12:40:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-11-16 12:40:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-11-16 12:40:40,860 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2022-11-16 12:40:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:40,860 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-11-16 12:40:40,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-11-16 12:40:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:40:40,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:40,861 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:40,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:41,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:41,068 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:41,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1822347189, now seen corresponding path program 10 times [2022-11-16 12:40:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:41,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168538741] [2022-11-16 12:40:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:41,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 32 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:41,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:41,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168538741] [2022-11-16 12:40:41,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168538741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:41,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414658210] [2022-11-16 12:40:41,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:40:41,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:41,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:41,931 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:41,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:40:42,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:40:42,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:40:42,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:42,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:40:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:42,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:43,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414658210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:43,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:43,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2022-11-16 12:40:43,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075441144] [2022-11-16 12:40:43,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:43,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 12:40:43,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 12:40:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:40:43,261 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 44 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 44 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:44,205 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2022-11-16 12:40:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:40:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 44 states have internal predecessors, (144), 0 states have call successors, (0), 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 59 [2022-11-16 12:40:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:44,207 INFO L225 Difference]: With dead ends: 67 [2022-11-16 12:40:44,207 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 12:40:44,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=700, Invalid=2722, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 12:40:44,208 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 384 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:44,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 341 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:40:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 12:40:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-11-16 12:40:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-11-16 12:40:44,211 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2022-11-16 12:40:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:44,211 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-11-16 12:40:44,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.3488372093023258) internal successors, (144), 44 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-11-16 12:40:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 12:40:44,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:44,213 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:44,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 12:40:44,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:44,417 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:44,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:44,418 INFO L85 PathProgramCache]: Analyzing trace with hash 897187429, now seen corresponding path program 11 times [2022-11-16 12:40:44,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:44,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961916132] [2022-11-16 12:40:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:44,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:44,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:44,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961916132] [2022-11-16 12:40:44,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961916132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:44,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448486009] [2022-11-16 12:40:44,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:40:44,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:44,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:44,954 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:44,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:40:45,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-16 12:40:45,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:45,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 12:40:45,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:45,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:46,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448486009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:46,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:46,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2022-11-16 12:40:46,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334107553] [2022-11-16 12:40:46,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:46,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 12:40:46,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:46,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 12:40:46,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:40:46,354 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:47,193 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-11-16 12:40:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:40:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 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 64 [2022-11-16 12:40:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:47,194 INFO L225 Difference]: With dead ends: 104 [2022-11-16 12:40:47,195 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 12:40:47,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:40:47,196 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 83 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:47,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 845 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:40:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 12:40:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-11-16 12:40:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-11-16 12:40:47,199 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2022-11-16 12:40:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:47,199 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-11-16 12:40:47,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-11-16 12:40:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:40:47,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:47,201 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:47,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:47,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:47,406 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2146504834, now seen corresponding path program 12 times [2022-11-16 12:40:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:47,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478518658] [2022-11-16 12:40:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 50 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:48,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:48,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478518658] [2022-11-16 12:40:48,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478518658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:48,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187308613] [2022-11-16 12:40:48,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:40:48,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:48,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:48,244 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:48,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:40:48,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-16 12:40:48,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:48,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:40:48,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:48,534 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 [2022-11-16 12:40:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 72 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:49,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 72 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:50,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187308613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:50,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:50,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-11-16 12:40:50,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700927761] [2022-11-16 12:40:50,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:50,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 12:40:50,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:50,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 12:40:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2690, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 12:40:50,026 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:51,059 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-11-16 12:40:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:40:51,060 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 0 states have call successors, (0), 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 68 [2022-11-16 12:40:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:51,060 INFO L225 Difference]: With dead ends: 76 [2022-11-16 12:40:51,060 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 12:40:51,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1052, Invalid=4204, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 12:40:51,062 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 277 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:51,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 495 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:40:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 12:40:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-11-16 12:40:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-11-16 12:40:51,065 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 68 [2022-11-16 12:40:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:51,066 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-11-16 12:40:51,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-11-16 12:40:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 12:40:51,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:51,067 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:51,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:51,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 12:40:51,272 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash -111069768, now seen corresponding path program 13 times [2022-11-16 12:40:51,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:51,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976814011] [2022-11-16 12:40:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:51,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976814011] [2022-11-16 12:40:51,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976814011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488287747] [2022-11-16 12:40:51,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:40:51,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:51,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:51,831 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:51,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:40:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:51,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 12:40:51,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:52,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:53,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488287747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:53,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:53,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2022-11-16 12:40:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925111654] [2022-11-16 12:40:53,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 12:40:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 12:40:53,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:40:53,021 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:53,877 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2022-11-16 12:40:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:40:53,877 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-16 12:40:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:53,879 INFO L225 Difference]: With dead ends: 118 [2022-11-16 12:40:53,880 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 12:40:53,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=228, Invalid=2742, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 12:40:53,881 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 170 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:53,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 858 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:40:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 12:40:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2022-11-16 12:40:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-11-16 12:40:53,884 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2022-11-16 12:40:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:53,885 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-11-16 12:40:53,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-11-16 12:40:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 12:40:53,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:53,886 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:53,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:54,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:40:54,092 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1527788603, now seen corresponding path program 14 times [2022-11-16 12:40:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:54,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068453831] [2022-11-16 12:40:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 72 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:55,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:55,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068453831] [2022-11-16 12:40:55,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068453831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:55,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462491775] [2022-11-16 12:40:55,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:40:55,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:55,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:55,117 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:55,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:40:55,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:40:55,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:55,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-16 12:40:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:55,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:56,244 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 5 [2022-11-16 12:40:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:56,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462491775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:56,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:40:56,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2022-11-16 12:40:56,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642461685] [2022-11-16 12:40:56,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:56,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 12:40:56,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 12:40:56,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1838, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 12:40:56,437 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:57,772 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2022-11-16 12:40:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:40:57,773 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-16 12:40:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:57,773 INFO L225 Difference]: With dead ends: 85 [2022-11-16 12:40:57,774 INFO L226 Difference]: Without dead ends: 85 [2022-11-16 12:40:57,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 121 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=811, Invalid=3349, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 12:40:57,775 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 247 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:57,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 603 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:40:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-16 12:40:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-11-16 12:40:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-11-16 12:40:57,778 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2022-11-16 12:40:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:57,778 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-11-16 12:40:57,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-11-16 12:40:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 12:40:57,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:57,780 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:57,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:40:57,983 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:40:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash 787512735, now seen corresponding path program 15 times [2022-11-16 12:40:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:57,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868778494] [2022-11-16 12:40:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:58,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:58,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868778494] [2022-11-16 12:40:58,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868778494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:58,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757901136] [2022-11-16 12:40:58,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:40:58,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:58,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:58,639 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:58,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:40:59,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-16 12:40:59,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 12:40:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:59,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:00,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757901136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:00,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:00,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2022-11-16 12:41:00,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440031901] [2022-11-16 12:41:00,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:00,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 12:41:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:00,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 12:41:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:41:00,657 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:01,768 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2022-11-16 12:41:01,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:41:01,768 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 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 82 [2022-11-16 12:41:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:01,769 INFO L225 Difference]: With dead ends: 132 [2022-11-16 12:41:01,769 INFO L226 Difference]: Without dead ends: 90 [2022-11-16 12:41:01,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=253, Invalid=3407, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 12:41:01,771 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 148 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:01,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1214 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:41:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-16 12:41:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-11-16 12:41:01,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-11-16 12:41:01,774 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2022-11-16 12:41:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:01,774 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-11-16 12:41:01,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-11-16 12:41:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 12:41:01,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:01,776 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:01,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:01,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:41:01,986 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:01,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1328274820, now seen corresponding path program 16 times [2022-11-16 12:41:01,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:01,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734040651] [2022-11-16 12:41:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:01,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 98 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:03,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:03,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734040651] [2022-11-16 12:41:03,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734040651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:03,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728589648] [2022-11-16 12:41:03,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:41:03,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:03,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:03,174 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:03,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:41:03,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:41:03,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:03,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 12:41:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:03,353 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 [2022-11-16 12:41:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:03,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 153 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:05,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728589648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:05,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:05,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2022-11-16 12:41:05,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643154342] [2022-11-16 12:41:05,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:05,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-16 12:41:05,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:05,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-16 12:41:05,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 12:41:05,209 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:06,570 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-11-16 12:41:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:41:06,571 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 0 states have call successors, (0), 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 86 [2022-11-16 12:41:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:06,572 INFO L225 Difference]: With dead ends: 94 [2022-11-16 12:41:06,572 INFO L226 Difference]: Without dead ends: 94 [2022-11-16 12:41:06,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1322, Invalid=4684, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 12:41:06,574 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 216 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:06,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 574 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:41:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-16 12:41:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-11-16 12:41:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-11-16 12:41:06,577 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 86 [2022-11-16 12:41:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:06,577 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-11-16 12:41:06,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-11-16 12:41:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-16 12:41:06,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:06,579 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:06,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:06,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:41:06,780 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:06,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:06,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1956884482, now seen corresponding path program 17 times [2022-11-16 12:41:06,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:06,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612529902] [2022-11-16 12:41:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:06,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:07,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612529902] [2022-11-16 12:41:07,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612529902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064918518] [2022-11-16 12:41:07,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:41:07,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:07,534 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:07,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:41:08,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-16 12:41:08,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 12:41:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:08,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:09,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064918518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:09,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:09,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-16 12:41:09,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784123635] [2022-11-16 12:41:09,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:09,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 12:41:09,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:09,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 12:41:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2126, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 12:41:09,675 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 48 states, 48 states have (on average 3.7916666666666665) internal successors, (182), 48 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:11,054 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2022-11-16 12:41:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:41:11,055 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.7916666666666665) internal successors, (182), 48 states have internal predecessors, (182), 0 states have call successors, (0), 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 91 [2022-11-16 12:41:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:11,055 INFO L225 Difference]: With dead ends: 146 [2022-11-16 12:41:11,055 INFO L226 Difference]: Without dead ends: 99 [2022-11-16 12:41:11,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=278, Invalid=4144, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 12:41:11,057 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 165 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:11,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1640 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:41:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-16 12:41:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-11-16 12:41:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-11-16 12:41:11,059 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2022-11-16 12:41:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:11,060 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-11-16 12:41:11,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.7916666666666665) internal successors, (182), 48 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-11-16 12:41:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 12:41:11,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:11,061 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:11,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:11,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:41:11,270 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:11,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:11,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1756877761, now seen corresponding path program 18 times [2022-11-16 12:41:11,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:11,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928750809] [2022-11-16 12:41:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:11,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 128 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:12,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:12,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928750809] [2022-11-16 12:41:12,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928750809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:12,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236503843] [2022-11-16 12:41:12,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:41:12,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:12,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:12,459 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:12,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:41:13,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-16 12:41:13,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:13,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:41:13,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:13,079 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 [2022-11-16 12:41:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 162 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:13,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 162 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:15,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236503843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:15,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:15,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2022-11-16 12:41:15,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149548934] [2022-11-16 12:41:15,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:15,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 12:41:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:15,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 12:41:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=4697, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 12:41:15,194 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 74 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 74 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:16,621 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2022-11-16 12:41:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 12:41:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 74 states have internal predecessors, (277), 0 states have call successors, (0), 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 95 [2022-11-16 12:41:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:16,622 INFO L225 Difference]: With dead ends: 103 [2022-11-16 12:41:16,623 INFO L226 Difference]: Without dead ends: 103 [2022-11-16 12:41:16,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1883, Invalid=7429, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 12:41:16,624 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 434 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:16,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 604 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:41:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-16 12:41:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-11-16 12:41:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-11-16 12:41:16,627 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2022-11-16 12:41:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:16,628 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-11-16 12:41:16,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 74 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-11-16 12:41:16,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-16 12:41:16,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:16,629 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:16,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-16 12:41:16,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:41:16,835 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash -924999207, now seen corresponding path program 19 times [2022-11-16 12:41:16,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:16,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121672415] [2022-11-16 12:41:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:16,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:17,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121672415] [2022-11-16 12:41:17,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121672415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807863750] [2022-11-16 12:41:17,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:41:17,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:17,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:17,657 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:17,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:41:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 12:41:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:19,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807863750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:19,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:19,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2022-11-16 12:41:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445400156] [2022-11-16 12:41:19,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:19,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:41:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:41:19,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:41:19,378 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:20,972 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2022-11-16 12:41:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:41:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 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 100 [2022-11-16 12:41:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:20,973 INFO L225 Difference]: With dead ends: 160 [2022-11-16 12:41:20,973 INFO L226 Difference]: Without dead ends: 108 [2022-11-16 12:41:20,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=303, Invalid=4953, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 12:41:20,975 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:20,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1978 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:41:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-16 12:41:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2022-11-16 12:41:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-11-16 12:41:20,978 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2022-11-16 12:41:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:20,978 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-11-16 12:41:20,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-11-16 12:41:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-16 12:41:20,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:20,980 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:20,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-16 12:41:21,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:21,185 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:21,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1790355830, now seen corresponding path program 20 times [2022-11-16 12:41:21,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:21,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405714724] [2022-11-16 12:41:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:21,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 162 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:22,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:22,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405714724] [2022-11-16 12:41:22,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405714724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:22,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005880178] [2022-11-16 12:41:22,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:41:22,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:22,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:22,658 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:22,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:41:22,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:41:22,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-16 12:41:22,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:22,807 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 [2022-11-16 12:41:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 200 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:23,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 200 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:24,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005880178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:24,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:24,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 68 [2022-11-16 12:41:24,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424436411] [2022-11-16 12:41:24,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:24,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-16 12:41:24,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:24,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-16 12:41:24,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=4113, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 12:41:24,840 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 69 states, 68 states have (on average 3.735294117647059) internal successors, (254), 69 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:26,674 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2022-11-16 12:41:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 12:41:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.735294117647059) internal successors, (254), 69 states have internal predecessors, (254), 0 states have call successors, (0), 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 104 [2022-11-16 12:41:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:26,680 INFO L225 Difference]: With dead ends: 112 [2022-11-16 12:41:26,680 INFO L226 Difference]: Without dead ends: 112 [2022-11-16 12:41:26,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1805, Invalid=6937, Unknown=0, NotChecked=0, Total=8742 [2022-11-16 12:41:26,681 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 758 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:26,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 800 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:41:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-16 12:41:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2022-11-16 12:41:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-11-16 12:41:26,685 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2022-11-16 12:41:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:26,685 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-11-16 12:41:26,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.735294117647059) internal successors, (254), 69 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-11-16 12:41:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-16 12:41:26,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:26,687 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:26,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:26,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:26,895 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash 45684036, now seen corresponding path program 21 times [2022-11-16 12:41:26,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:26,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511801115] [2022-11-16 12:41:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:26,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511801115] [2022-11-16 12:41:27,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511801115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633437176] [2022-11-16 12:41:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:41:27,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:27,854 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:27,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:41:28,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-16 12:41:28,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:28,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 12:41:28,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:28,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 27 proven. 501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:31,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633437176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:31,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:31,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 58 [2022-11-16 12:41:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929622087] [2022-11-16 12:41:31,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:31,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 12:41:31,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 12:41:31,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3122, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 12:41:31,237 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 58 states, 58 states have (on average 3.793103448275862) internal successors, (220), 58 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:33,610 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2022-11-16 12:41:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:41:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.793103448275862) internal successors, (220), 58 states have internal predecessors, (220), 0 states have call successors, (0), 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 109 [2022-11-16 12:41:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:33,611 INFO L225 Difference]: With dead ends: 174 [2022-11-16 12:41:33,611 INFO L226 Difference]: Without dead ends: 117 [2022-11-16 12:41:33,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=406, Invalid=6400, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 12:41:33,613 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 216 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:33,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1931 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:41:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-16 12:41:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-11-16 12:41:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2022-11-16 12:41:33,616 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 109 [2022-11-16 12:41:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:33,617 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2022-11-16 12:41:33,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.793103448275862) internal successors, (220), 58 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2022-11-16 12:41:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 12:41:33,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:33,618 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:33,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 12:41:33,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 12:41:33,824 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 941772359, now seen corresponding path program 22 times [2022-11-16 12:41:33,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:33,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157078184] [2022-11-16 12:41:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 200 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:35,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:35,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157078184] [2022-11-16 12:41:35,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157078184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:35,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354440529] [2022-11-16 12:41:35,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:41:35,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:35,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:35,596 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:35,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:41:36,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:41:36,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:36,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-16 12:41:36,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:36,040 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 [2022-11-16 12:41:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:36,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 276 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:38,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354440529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:38,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:38,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 71 [2022-11-16 12:41:38,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551252289] [2022-11-16 12:41:38,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:38,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-16 12:41:38,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:38,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-16 12:41:38,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=4404, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 12:41:38,683 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 72 states, 71 states have (on average 3.887323943661972) internal successors, (276), 72 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:40,798 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2022-11-16 12:41:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:41:40,799 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.887323943661972) internal successors, (276), 72 states have internal predecessors, (276), 0 states have call successors, (0), 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 113 [2022-11-16 12:41:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:40,799 INFO L225 Difference]: With dead ends: 121 [2022-11-16 12:41:40,799 INFO L226 Difference]: Without dead ends: 121 [2022-11-16 12:41:40,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2123, Invalid=7579, Unknown=0, NotChecked=0, Total=9702 [2022-11-16 12:41:40,801 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 415 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:40,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1014 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:41:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-16 12:41:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-11-16 12:41:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-11-16 12:41:40,804 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 113 [2022-11-16 12:41:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:40,805 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-11-16 12:41:40,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.887323943661972) internal successors, (276), 72 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-11-16 12:41:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-16 12:41:40,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:40,806 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:40,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:41,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 12:41:41,011 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash 530107155, now seen corresponding path program 23 times [2022-11-16 12:41:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:41,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430862632] [2022-11-16 12:41:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:41,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:42,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430862632] [2022-11-16 12:41:42,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430862632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175983536] [2022-11-16 12:41:42,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:41:42,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:42,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:42,024 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:42,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:41:43,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-16 12:41:43,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:43,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 12:41:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:44,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:45,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175983536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:45,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:45,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2022-11-16 12:41:45,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681381524] [2022-11-16 12:41:45,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:45,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 12:41:45,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 12:41:45,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 12:41:45,598 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 60 states, 60 states have (on average 3.933333333333333) internal successors, (236), 60 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:47,818 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2022-11-16 12:41:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 12:41:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.933333333333333) internal successors, (236), 60 states have internal predecessors, (236), 0 states have call successors, (0), 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 118 [2022-11-16 12:41:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:47,820 INFO L225 Difference]: With dead ends: 188 [2022-11-16 12:41:47,820 INFO L226 Difference]: Without dead ends: 126 [2022-11-16 12:41:47,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=353, Invalid=6787, Unknown=0, NotChecked=0, Total=7140 [2022-11-16 12:41:47,821 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 155 mSDsluCounter, 2788 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:47,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 2854 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2433 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:41:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-16 12:41:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-11-16 12:41:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2022-11-16 12:41:47,825 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 118 [2022-11-16 12:41:47,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:47,825 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2022-11-16 12:41:47,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.933333333333333) internal successors, (236), 60 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2022-11-16 12:41:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-16 12:41:47,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:47,827 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:47,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-16 12:41:48,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:48,034 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash 660342128, now seen corresponding path program 24 times [2022-11-16 12:41:48,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:48,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699516139] [2022-11-16 12:41:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:48,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 242 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:49,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699516139] [2022-11-16 12:41:49,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699516139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336373400] [2022-11-16 12:41:49,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:41:49,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:49,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:49,551 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:49,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:41:50,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-16 12:41:50,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:50,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-16 12:41:50,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:50,275 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 [2022-11-16 12:41:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:51,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:53,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336373400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:53,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:53,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2022-11-16 12:41:53,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316949850] [2022-11-16 12:41:53,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:53,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-16 12:41:53,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:53,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-16 12:41:53,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1119, Invalid=7253, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 12:41:53,182 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 92 states, 91 states have (on average 3.934065934065934) internal successors, (358), 92 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:55,107 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2022-11-16 12:41:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:41:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 3.934065934065934) internal successors, (358), 92 states have internal predecessors, (358), 0 states have call successors, (0), 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 122 [2022-11-16 12:41:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:55,108 INFO L225 Difference]: With dead ends: 130 [2022-11-16 12:41:55,108 INFO L226 Difference]: Without dead ends: 130 [2022-11-16 12:41:55,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2957, Invalid=11563, Unknown=0, NotChecked=0, Total=14520 [2022-11-16 12:41:55,109 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 721 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:55,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 837 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:41:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-16 12:41:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2022-11-16 12:41:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-11-16 12:41:55,113 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 122 [2022-11-16 12:41:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:55,114 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-11-16 12:41:55,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 3.934065934065934) internal successors, (358), 92 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-11-16 12:41:55,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-16 12:41:55,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:55,115 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:55,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:55,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:55,322 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:41:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:55,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1490036106, now seen corresponding path program 25 times [2022-11-16 12:41:55,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:55,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650355784] [2022-11-16 12:41:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:55,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:56,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:56,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650355784] [2022-11-16 12:41:56,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650355784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:56,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328451942] [2022-11-16 12:41:56,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:41:56,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:56,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:56,435 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:56,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:41:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:56,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 12:41:56,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:57,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:58,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328451942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:58,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:58,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2022-11-16 12:41:58,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845628410] [2022-11-16 12:41:58,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:58,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 12:41:58,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:58,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 12:41:58,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3862, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 12:41:58,731 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 64 states, 64 states have (on average 3.96875) internal successors, (254), 64 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:01,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:01,194 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2022-11-16 12:42:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 12:42:01,194 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.96875) internal successors, (254), 64 states have internal predecessors, (254), 0 states have call successors, (0), 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 127 [2022-11-16 12:42:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:01,195 INFO L225 Difference]: With dead ends: 202 [2022-11-16 12:42:01,195 INFO L226 Difference]: Without dead ends: 135 [2022-11-16 12:42:01,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=378, Invalid=7812, Unknown=0, NotChecked=0, Total=8190 [2022-11-16 12:42:01,196 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 304 mSDsluCounter, 2992 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 3063 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:01,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 3063 Invalid, 2570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 12:42:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-16 12:42:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2022-11-16 12:42:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-11-16 12:42:01,200 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2022-11-16 12:42:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:01,201 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-11-16 12:42:01,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.96875) internal successors, (254), 64 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-11-16 12:42:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 12:42:01,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:01,203 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:01,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:01,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 12:42:01,409 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:42:01,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:01,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1094958131, now seen corresponding path program 26 times [2022-11-16 12:42:01,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:01,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555097085] [2022-11-16 12:42:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:01,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 288 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:03,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555097085] [2022-11-16 12:42:03,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555097085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237487377] [2022-11-16 12:42:03,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:03,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:03,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:03,383 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:03,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 12:42:03,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:03,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:03,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-16 12:42:03,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:04,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:05,472 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 5 [2022-11-16 12:42:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:05,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237487377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:05,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:05,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 69 [2022-11-16 12:42:05,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632886001] [2022-11-16 12:42:05,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:05,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 12:42:05,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:05,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 12:42:05,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=4286, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 12:42:05,916 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:08,426 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2022-11-16 12:42:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 12:42:08,427 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 0 states have call successors, (0), 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 131 [2022-11-16 12:42:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:08,428 INFO L225 Difference]: With dead ends: 139 [2022-11-16 12:42:08,428 INFO L226 Difference]: Without dead ends: 139 [2022-11-16 12:42:08,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 211 SyntacticMatches, 14 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1957, Invalid=8143, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 12:42:08,429 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 478 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:08,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1247 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:42:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-16 12:42:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-11-16 12:42:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-11-16 12:42:08,432 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2022-11-16 12:42:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:08,432 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-11-16 12:42:08,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-11-16 12:42:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 12:42:08,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:08,434 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:08,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-16 12:42:08,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 12:42:08,639 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:42:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash -929474227, now seen corresponding path program 27 times [2022-11-16 12:42:08,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:08,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707937697] [2022-11-16 12:42:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:08,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:09,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:09,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707937697] [2022-11-16 12:42:09,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707937697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:09,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153886949] [2022-11-16 12:42:09,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:42:09,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:09,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:09,801 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:09,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 12:42:11,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-16 12:42:11,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:11,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:42:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:12,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:14,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153886949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:14,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:14,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2022-11-16 12:42:14,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827589143] [2022-11-16 12:42:14,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:14,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-16 12:42:14,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-16 12:42:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4376, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 12:42:14,238 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:17,022 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2022-11-16 12:42:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:42:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 0 states have call successors, (0), 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 136 [2022-11-16 12:42:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:17,024 INFO L225 Difference]: With dead ends: 216 [2022-11-16 12:42:17,024 INFO L226 Difference]: Without dead ends: 144 [2022-11-16 12:42:17,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=403, Invalid=8909, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 12:42:17,025 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 250 mSDsluCounter, 3378 mSDsCounter, 0 mSdLazyCounter, 2876 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 3454 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:17,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 3454 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2876 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 12:42:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-16 12:42:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-11-16 12:42:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-11-16 12:42:17,029 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 136 [2022-11-16 12:42:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:17,029 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-11-16 12:42:17,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-11-16 12:42:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:42:17,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:17,030 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:17,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:17,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:17,231 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:42:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:17,231 INFO L85 PathProgramCache]: Analyzing trace with hash -693660054, now seen corresponding path program 28 times [2022-11-16 12:42:17,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:17,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705613679] [2022-11-16 12:42:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:17,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 338 proven. 580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:19,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:19,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705613679] [2022-11-16 12:42:19,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705613679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:19,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718480346] [2022-11-16 12:42:19,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:42:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:19,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:19,041 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:19,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 12:42:19,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:42:19,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:19,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-16 12:42:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:19,481 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 [2022-11-16 12:42:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 392 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:20,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 435 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:23,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718480346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:23,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:23,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 86 [2022-11-16 12:42:23,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024949584] [2022-11-16 12:42:23,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:23,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-16 12:42:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-16 12:42:23,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=6447, Unknown=0, NotChecked=0, Total=7482 [2022-11-16 12:42:23,025 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 87 states, 86 states have (on average 3.9767441860465116) internal successors, (342), 87 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:25,697 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2022-11-16 12:42:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 12:42:25,697 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.9767441860465116) internal successors, (342), 87 states have internal predecessors, (342), 0 states have call successors, (0), 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 140 [2022-11-16 12:42:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:25,698 INFO L225 Difference]: With dead ends: 148 [2022-11-16 12:42:25,698 INFO L226 Difference]: Without dead ends: 148 [2022-11-16 12:42:25,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3113, Invalid=11167, Unknown=0, NotChecked=0, Total=14280 [2022-11-16 12:42:25,700 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 836 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:25,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 1364 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:42:25,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-16 12:42:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2022-11-16 12:42:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2022-11-16 12:42:25,704 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 140 [2022-11-16 12:42:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:25,704 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2022-11-16 12:42:25,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.9767441860465116) internal successors, (342), 87 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2022-11-16 12:42:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-16 12:42:25,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:25,705 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:25,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:25,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 12:42:25,907 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:42:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash -455466800, now seen corresponding path program 29 times [2022-11-16 12:42:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230342423] [2022-11-16 12:42:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:25,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:27,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:27,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230342423] [2022-11-16 12:42:27,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230342423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:27,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687795815] [2022-11-16 12:42:27,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:42:27,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:27,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:27,302 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:27,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 12:42:28,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-16 12:42:28,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:28,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 12:42:28,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:29,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:31,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687795815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:31,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:31,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 72 [2022-11-16 12:42:31,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729089179] [2022-11-16 12:42:31,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:31,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-16 12:42:31,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-16 12:42:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4922, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 12:42:31,285 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 72 states, 72 states have (on average 4.027777777777778) internal successors, (290), 72 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:34,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:34,429 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2022-11-16 12:42:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 12:42:34,429 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.027777777777778) internal successors, (290), 72 states have internal predecessors, (290), 0 states have call successors, (0), 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 145 [2022-11-16 12:42:34,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:34,430 INFO L225 Difference]: With dead ends: 230 [2022-11-16 12:42:34,430 INFO L226 Difference]: Without dead ends: 153 [2022-11-16 12:42:34,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=428, Invalid=10078, Unknown=0, NotChecked=0, Total=10506 [2022-11-16 12:42:34,431 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 196 mSDsluCounter, 3855 mSDsCounter, 0 mSdLazyCounter, 3277 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 3936 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:34,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 3936 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3277 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:42:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-16 12:42:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2022-11-16 12:42:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2022-11-16 12:42:34,434 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 145 [2022-11-16 12:42:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:34,435 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2022-11-16 12:42:34,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.027777777777778) internal successors, (290), 72 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2022-11-16 12:42:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-16 12:42:34,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:34,436 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:34,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:34,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 12:42:34,637 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:42:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash -221096877, now seen corresponding path program 30 times [2022-11-16 12:42:34,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:34,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66917619] [2022-11-16 12:42:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:34,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 392 proven. 659 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:36,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:36,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66917619] [2022-11-16 12:42:36,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66917619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:36,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679229138] [2022-11-16 12:42:36,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:42:36,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:36,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:36,772 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:36,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 12:42:39,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-16 12:42:39,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:39,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-16 12:42:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 450 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:40,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:42,271 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 5 [2022-11-16 12:42:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 450 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:42,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679229138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:42,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:42,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 93 [2022-11-16 12:42:42,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613243573] [2022-11-16 12:42:42,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:42,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-16 12:42:42,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:42,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-16 12:42:42,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1208, Invalid=7534, Unknown=0, NotChecked=0, Total=8742 [2022-11-16 12:42:42,824 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 94 states, 93 states have (on average 4.053763440860215) internal successors, (377), 94 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:45,725 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2022-11-16 12:42:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 12:42:45,725 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 4.053763440860215) internal successors, (377), 94 states have internal predecessors, (377), 0 states have call successors, (0), 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 149 [2022-11-16 12:42:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:45,726 INFO L225 Difference]: With dead ends: 157 [2022-11-16 12:42:45,726 INFO L226 Difference]: Without dead ends: 157 [2022-11-16 12:42:45,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 225 SyntacticMatches, 16 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5153 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3290, Invalid=13222, Unknown=0, NotChecked=0, Total=16512 [2022-11-16 12:42:45,728 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 871 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:45,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 937 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:42:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-16 12:42:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2022-11-16 12:42:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2022-11-16 12:42:45,731 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 149 [2022-11-16 12:42:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:45,731 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2022-11-16 12:42:45,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 4.053763440860215) internal successors, (377), 94 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2022-11-16 12:42:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-16 12:42:45,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:45,733 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:45,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:45,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:45,933 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:42:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash -461984633, now seen corresponding path program 31 times [2022-11-16 12:42:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:45,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985804272] [2022-11-16 12:42:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:47,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985804272] [2022-11-16 12:42:47,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985804272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594953361] [2022-11-16 12:42:47,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:42:47,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:47,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:47,204 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:47,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 12:42:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:47,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 12:42:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:48,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:50,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594953361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:50,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:50,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2022-11-16 12:42:50,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951063540] [2022-11-16 12:42:50,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:50,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-16 12:42:50,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:50,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-16 12:42:50,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=5500, Unknown=0, NotChecked=0, Total=5700 [2022-11-16 12:42:50,472 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 76 states, 76 states have (on average 4.052631578947368) internal successors, (308), 76 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:53,970 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2022-11-16 12:42:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-16 12:42:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.052631578947368) internal successors, (308), 76 states have internal predecessors, (308), 0 states have call successors, (0), 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 154 [2022-11-16 12:42:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:53,971 INFO L225 Difference]: With dead ends: 244 [2022-11-16 12:42:53,971 INFO L226 Difference]: Without dead ends: 162 [2022-11-16 12:42:53,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=453, Invalid=11319, Unknown=0, NotChecked=0, Total=11772 [2022-11-16 12:42:53,973 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 452 mSDsluCounter, 4135 mSDsCounter, 0 mSdLazyCounter, 3494 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 4221 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:53,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 4221 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3494 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 12:42:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-16 12:42:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2022-11-16 12:42:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2022-11-16 12:42:53,977 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2022-11-16 12:42:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:53,977 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2022-11-16 12:42:53,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.052631578947368) internal successors, (308), 76 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2022-11-16 12:42:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-16 12:42:53,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:53,978 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:53,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:54,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-16 12:42:54,186 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:42:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:54,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1331905436, now seen corresponding path program 32 times [2022-11-16 12:42:54,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:54,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526318241] [2022-11-16 12:42:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:54,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 450 proven. 743 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526318241] [2022-11-16 12:42:56,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526318241] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:56,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551164065] [2022-11-16 12:42:56,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:56,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:56,119 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:56,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 12:42:56,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:56,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 162 conjunts are in the unsatisfiable core [2022-11-16 12:42:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:57,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:58,650 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 5 [2022-11-16 12:42:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:59,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551164065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:59,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:59,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 81 [2022-11-16 12:42:59,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808188869] [2022-11-16 12:42:59,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:59,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-16 12:42:59,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-16 12:42:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=5888, Unknown=0, NotChecked=0, Total=6642 [2022-11-16 12:42:59,237 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:02,243 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2022-11-16 12:43:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 12:43:02,244 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 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 158 [2022-11-16 12:43:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:02,245 INFO L225 Difference]: With dead ends: 166 [2022-11-16 12:43:02,245 INFO L226 Difference]: Without dead ends: 166 [2022-11-16 12:43:02,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 256 SyntacticMatches, 17 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4022 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2719, Invalid=11323, Unknown=0, NotChecked=0, Total=14042 [2022-11-16 12:43:02,247 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 848 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:02,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 1983 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 12:43:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-16 12:43:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2022-11-16 12:43:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-11-16 12:43:02,251 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 158 [2022-11-16 12:43:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:02,252 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-11-16 12:43:02,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-11-16 12:43:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-16 12:43:02,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:02,253 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:02,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:02,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:02,459 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:43:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -907041002, now seen corresponding path program 33 times [2022-11-16 12:43:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:02,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938771153] [2022-11-16 12:43:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:02,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:03,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:03,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938771153] [2022-11-16 12:43:03,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938771153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:03,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205918191] [2022-11-16 12:43:03,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:43:03,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:03,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:03,947 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:03,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 12:43:09,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-16 12:43:09,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-16 12:43:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:09,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:12,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205918191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:12,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:12,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2022-11-16 12:43:12,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928480467] [2022-11-16 12:43:12,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:12,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-16 12:43:12,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:12,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-16 12:43:12,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 12:43:12,320 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:16,217 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2022-11-16 12:43:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 12:43:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 0 states have call successors, (0), 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 163 [2022-11-16 12:43:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:16,218 INFO L225 Difference]: With dead ends: 258 [2022-11-16 12:43:16,218 INFO L226 Difference]: Without dead ends: 171 [2022-11-16 12:43:16,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=478, Invalid=12632, Unknown=0, NotChecked=0, Total=13110 [2022-11-16 12:43:16,220 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 387 mSDsluCounter, 4778 mSDsCounter, 0 mSdLazyCounter, 4080 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 4869 SdHoareTripleChecker+Invalid, 4099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 4080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:16,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 4869 Invalid, 4099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 4080 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-16 12:43:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-16 12:43:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2022-11-16 12:43:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2022-11-16 12:43:16,224 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2022-11-16 12:43:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:16,224 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2022-11-16 12:43:16,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2022-11-16 12:43:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-16 12:43:16,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:16,226 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:16,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:16,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:16,434 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:43:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2039554009, now seen corresponding path program 34 times [2022-11-16 12:43:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:16,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685589162] [2022-11-16 12:43:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:16,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 512 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:18,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:18,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685589162] [2022-11-16 12:43:18,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685589162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:18,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614027993] [2022-11-16 12:43:18,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:43:18,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:18,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:18,958 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:18,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 12:43:19,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:43:19,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 177 conjunts are in the unsatisfiable core [2022-11-16 12:43:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:19,628 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 [2022-11-16 12:43:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 578 proven. 766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:20,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:24,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614027993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:24,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:24,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 101 [2022-11-16 12:43:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312739376] [2022-11-16 12:43:24,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:24,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-16 12:43:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:24,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-16 12:43:24,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1425, Invalid=8877, Unknown=0, NotChecked=0, Total=10302 [2022-11-16 12:43:24,117 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 102 states, 101 states have (on average 4.03960396039604) internal successors, (408), 102 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:27,746 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2022-11-16 12:43:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 12:43:27,746 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 4.03960396039604) internal successors, (408), 102 states have internal predecessors, (408), 0 states have call successors, (0), 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 167 [2022-11-16 12:43:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:27,747 INFO L225 Difference]: With dead ends: 175 [2022-11-16 12:43:27,747 INFO L226 Difference]: Without dead ends: 175 [2022-11-16 12:43:27,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4292, Invalid=15448, Unknown=0, NotChecked=0, Total=19740 [2022-11-16 12:43:27,749 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 697 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 2871 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:27,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 1946 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2871 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:43:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-16 12:43:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-11-16 12:43:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2022-11-16 12:43:27,753 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 167 [2022-11-16 12:43:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:27,754 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2022-11-16 12:43:27,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 4.03960396039604) internal successors, (408), 102 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2022-11-16 12:43:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-16 12:43:27,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:27,755 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:27,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-16 12:43:27,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 12:43:27,963 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:43:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 820520129, now seen corresponding path program 35 times [2022-11-16 12:43:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:27,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365461504] [2022-11-16 12:43:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:27,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:29,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:29,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365461504] [2022-11-16 12:43:29,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365461504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:29,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598166329] [2022-11-16 12:43:29,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:43:29,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:29,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:29,602 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:29,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 12:43:39,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-11-16 12:43:39,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:39,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 12:43:39,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:40,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:43,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598166329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:43,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:43,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 84 [2022-11-16 12:43:43,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578203711] [2022-11-16 12:43:43,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:43,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-16 12:43:43,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-16 12:43:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=6752, Unknown=0, NotChecked=0, Total=6972 [2022-11-16 12:43:43,339 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 84 states, 84 states have (on average 4.095238095238095) internal successors, (344), 84 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:47,662 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2022-11-16 12:43:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 12:43:47,662 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.095238095238095) internal successors, (344), 84 states have internal predecessors, (344), 0 states have call successors, (0), 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 172 [2022-11-16 12:43:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:47,664 INFO L225 Difference]: With dead ends: 272 [2022-11-16 12:43:47,664 INFO L226 Difference]: Without dead ends: 180 [2022-11-16 12:43:47,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=503, Invalid=14017, Unknown=0, NotChecked=0, Total=14520 [2022-11-16 12:43:47,665 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 327 mSDsluCounter, 5312 mSDsCounter, 0 mSdLazyCounter, 4456 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 5408 SdHoareTripleChecker+Invalid, 4477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 4456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:47,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 5408 Invalid, 4477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 4456 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 12:43:47,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-16 12:43:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2022-11-16 12:43:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2022-11-16 12:43:47,670 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 172 [2022-11-16 12:43:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:47,670 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2022-11-16 12:43:47,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.095238095238095) internal successors, (344), 84 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2022-11-16 12:43:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-16 12:43:47,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:47,672 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:47,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:47,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 12:43:47,881 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:43:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash 123656030, now seen corresponding path program 36 times [2022-11-16 12:43:47,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:47,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469982800] [2022-11-16 12:43:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 578 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:50,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469982800] [2022-11-16 12:43:50,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469982800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017592259] [2022-11-16 12:43:50,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:43:50,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:50,420 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:50,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 12:44:03,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-11-16 12:44:03,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:03,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 147 conjunts are in the unsatisfiable core [2022-11-16 12:44:03,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:03,534 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 [2022-11-16 12:44:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 648 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:05,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 648 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017592259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:08,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:08,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 127 [2022-11-16 12:44:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309723001] [2022-11-16 12:44:08,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:08,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-11-16 12:44:08,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-11-16 12:44:08,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2244, Invalid=14012, Unknown=0, NotChecked=0, Total=16256 [2022-11-16 12:44:08,656 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 128 states, 127 states have (on average 4.094488188976378) internal successors, (520), 128 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:11,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:11,891 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-11-16 12:44:11,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 12:44:11,892 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 4.094488188976378) internal successors, (520), 128 states have internal predecessors, (520), 0 states have call successors, (0), 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 176 [2022-11-16 12:44:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:11,892 INFO L225 Difference]: With dead ends: 184 [2022-11-16 12:44:11,893 INFO L226 Difference]: Without dead ends: 184 [2022-11-16 12:44:11,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7786 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5834, Invalid=22558, Unknown=0, NotChecked=0, Total=28392 [2022-11-16 12:44:11,895 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1011 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:11,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 1550 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2093 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:44:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-16 12:44:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2022-11-16 12:44:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0165745856353592) internal successors, (184), 181 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2022-11-16 12:44:11,899 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 176 [2022-11-16 12:44:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:11,900 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2022-11-16 12:44:11,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 4.094488188976378) internal successors, (520), 128 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2022-11-16 12:44:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-16 12:44:11,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:11,901 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:11,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:12,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:12,111 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:44:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:12,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1695111260, now seen corresponding path program 37 times [2022-11-16 12:44:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:12,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719035818] [2022-11-16 12:44:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 38 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719035818] [2022-11-16 12:44:13,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719035818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587172814] [2022-11-16 12:44:13,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:44:13,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:13,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:13,735 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:13,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 12:44:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:14,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:44:14,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 38 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:15,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 38 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:18,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587172814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:18,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:18,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 88 [2022-11-16 12:44:18,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490736846] [2022-11-16 12:44:18,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:18,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-16 12:44:18,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-16 12:44:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=7426, Unknown=0, NotChecked=0, Total=7656 [2022-11-16 12:44:18,439 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand has 88 states, 88 states have (on average 4.113636363636363) internal successors, (362), 88 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:23,218 INFO L93 Difference]: Finished difference Result 286 states and 288 transitions. [2022-11-16 12:44:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 12:44:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 4.113636363636363) internal successors, (362), 88 states have internal predecessors, (362), 0 states have call successors, (0), 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 181 [2022-11-16 12:44:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:23,224 INFO L225 Difference]: With dead ends: 286 [2022-11-16 12:44:23,224 INFO L226 Difference]: Without dead ends: 189 [2022-11-16 12:44:23,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=528, Invalid=15474, Unknown=0, NotChecked=0, Total=16002 [2022-11-16 12:44:23,227 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 338 mSDsluCounter, 5704 mSDsCounter, 0 mSdLazyCounter, 4790 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 5805 SdHoareTripleChecker+Invalid, 4811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 4790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:23,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 5805 Invalid, 4811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 4790 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 12:44:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-16 12:44:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2022-11-16 12:44:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0162162162162163) internal successors, (188), 185 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2022-11-16 12:44:23,237 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 181 [2022-11-16 12:44:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:23,238 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2022-11-16 12:44:23,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 4.113636363636363) internal successors, (362), 88 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2022-11-16 12:44:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-16 12:44:23,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:23,241 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:23,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:23,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 12:44:23,449 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:44:23,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:23,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1426409055, now seen corresponding path program 38 times [2022-11-16 12:44:23,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:23,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321077444] [2022-11-16 12:44:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:23,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 648 proven. 1025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:26,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321077444] [2022-11-16 12:44:26,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321077444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080222374] [2022-11-16 12:44:26,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:44:26,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:26,343 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:26,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 12:44:26,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:44:26,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:26,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 189 conjunts are in the unsatisfiable core [2022-11-16 12:44:26,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 722 proven. 951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:27,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:29,690 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 5 [2022-11-16 12:44:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 722 proven. 951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:30,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080222374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:30,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:30,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 93 [2022-11-16 12:44:30,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314714689] [2022-11-16 12:44:30,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:30,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-16 12:44:30,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:30,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-16 12:44:30,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=7742, Unknown=0, NotChecked=0, Total=8742 [2022-11-16 12:44:30,492 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand has 94 states, 93 states have (on average 4.021505376344086) internal successors, (374), 94 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:34,908 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2022-11-16 12:44:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 12:44:34,909 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 4.021505376344086) internal successors, (374), 94 states have internal predecessors, (374), 0 states have call successors, (0), 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 185 [2022-11-16 12:44:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:34,910 INFO L225 Difference]: With dead ends: 193 [2022-11-16 12:44:34,910 INFO L226 Difference]: Without dead ends: 193 [2022-11-16 12:44:34,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 301 SyntacticMatches, 20 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5453 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3607, Invalid=15025, Unknown=0, NotChecked=0, Total=18632 [2022-11-16 12:44:34,911 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 1096 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 3691 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:34,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 2531 Invalid, 3717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3691 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 12:44:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-16 12:44:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2022-11-16 12:44:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2022-11-16 12:44:34,915 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 185 [2022-11-16 12:44:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:34,916 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2022-11-16 12:44:34,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 4.021505376344086) internal successors, (374), 94 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2022-11-16 12:44:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-16 12:44:34,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:34,917 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:34,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:35,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 12:44:35,119 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:44:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 449126907, now seen corresponding path program 39 times [2022-11-16 12:44:35,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:35,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011925313] [2022-11-16 12:44:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:35,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 40 proven. 1730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:36,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:36,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011925313] [2022-11-16 12:44:36,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011925313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:36,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474965793] [2022-11-16 12:44:36,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:44:36,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:36,878 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:36,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-16 12:44:42,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-11-16 12:44:42,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 12:44:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 40 proven. 1730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:42,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 40 proven. 1730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:46,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474965793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:46,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:46,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 92 [2022-11-16 12:44:46,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961579264] [2022-11-16 12:44:46,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:46,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-16 12:44:46,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:46,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-16 12:44:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=8132, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 12:44:46,404 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 92 states, 92 states have (on average 4.130434782608695) internal successors, (380), 92 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:51,553 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2022-11-16 12:44:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-16 12:44:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 4.130434782608695) internal successors, (380), 92 states have internal predecessors, (380), 0 states have call successors, (0), 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 190 [2022-11-16 12:44:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:51,554 INFO L225 Difference]: With dead ends: 300 [2022-11-16 12:44:51,554 INFO L226 Difference]: Without dead ends: 198 [2022-11-16 12:44:51,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=553, Invalid=17003, Unknown=0, NotChecked=0, Total=17556 [2022-11-16 12:44:51,556 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 456 mSDsluCounter, 6187 mSDsCounter, 0 mSdLazyCounter, 5182 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 6293 SdHoareTripleChecker+Invalid, 5204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 5182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:51,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 6293 Invalid, 5204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 5182 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 12:44:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-16 12:44:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2022-11-16 12:44:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2022-11-16 12:44:51,562 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 190 [2022-11-16 12:44:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:51,562 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2022-11-16 12:44:51,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 4.130434782608695) internal successors, (380), 92 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2022-11-16 12:44:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-16 12:44:51,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:51,564 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:51,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-16 12:44:51,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-16 12:44:51,773 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:44:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash 422659928, now seen corresponding path program 40 times [2022-11-16 12:44:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:51,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212685146] [2022-11-16 12:44:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:51,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 722 proven. 1129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:54,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:54,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212685146] [2022-11-16 12:44:54,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212685146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:54,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843832919] [2022-11-16 12:44:54,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:44:54,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:54,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:54,736 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:54,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 12:44:55,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:44:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:55,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 198 conjunts are in the unsatisfiable core [2022-11-16 12:44:55,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 800 proven. 1051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:56,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:58,247 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 5 [2022-11-16 12:44:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 800 proven. 1051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:59,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843832919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:59,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:59,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 97 [2022-11-16 12:44:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506796591] [2022-11-16 12:44:59,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:59,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-16 12:44:59,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-16 12:44:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=8416, Unknown=0, NotChecked=0, Total=9506 [2022-11-16 12:44:59,054 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 98 states, 97 states have (on average 4.041237113402062) internal successors, (392), 98 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:02,827 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2022-11-16 12:45:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 12:45:02,828 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 4.041237113402062) internal successors, (392), 98 states have internal predecessors, (392), 0 states have call successors, (0), 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 194 [2022-11-16 12:45:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:02,830 INFO L225 Difference]: With dead ends: 202 [2022-11-16 12:45:02,830 INFO L226 Difference]: Without dead ends: 202 [2022-11-16 12:45:02,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 316 SyntacticMatches, 21 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5978 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3931, Invalid=16375, Unknown=0, NotChecked=0, Total=20306 [2022-11-16 12:45:02,832 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 809 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 3426 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:02,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 2361 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3426 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:45:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-16 12:45:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-11-16 12:45:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.015075376884422) internal successors, (202), 199 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2022-11-16 12:45:02,836 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 194 [2022-11-16 12:45:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:02,836 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2022-11-16 12:45:02,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 4.041237113402062) internal successors, (392), 98 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2022-11-16 12:45:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-16 12:45:02,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:02,838 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:02,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-16 12:45:03,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-16 12:45:03,045 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:45:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:03,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1157639006, now seen corresponding path program 41 times [2022-11-16 12:45:03,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:03,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361807336] [2022-11-16 12:45:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:03,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 42 proven. 1911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:05,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:05,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361807336] [2022-11-16 12:45:05,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361807336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:05,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565334707] [2022-11-16 12:45:05,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:45:05,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:05,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:05,035 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:05,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-16 12:46:06,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-11-16 12:46:06,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:46:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-16 12:46:06,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 42 proven. 1911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:07,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 42 proven. 1911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:11,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565334707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:11,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:46:11,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-16 12:46:11,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67784562] [2022-11-16 12:46:11,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:11,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-16 12:46:11,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-16 12:46:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=8870, Unknown=0, NotChecked=0, Total=9120 [2022-11-16 12:46:11,189 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand has 96 states, 96 states have (on average 4.145833333333333) internal successors, (398), 96 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:16,862 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2022-11-16 12:46:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-16 12:46:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 4.145833333333333) internal successors, (398), 96 states have internal predecessors, (398), 0 states have call successors, (0), 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 199 [2022-11-16 12:46:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:16,863 INFO L225 Difference]: With dead ends: 314 [2022-11-16 12:46:16,863 INFO L226 Difference]: Without dead ends: 207 [2022-11-16 12:46:16,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=578, Invalid=18604, Unknown=0, NotChecked=0, Total=19182 [2022-11-16 12:46:16,865 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 372 mSDsluCounter, 7027 mSDsCounter, 0 mSdLazyCounter, 5867 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 7138 SdHoareTripleChecker+Invalid, 5890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 5867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:16,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 7138 Invalid, 5890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 5867 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 12:46:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-16 12:46:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2022-11-16 12:46:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2022-11-16 12:46:16,869 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 199 [2022-11-16 12:46:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:16,869 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2022-11-16 12:46:16,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 4.145833333333333) internal successors, (398), 96 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2022-11-16 12:46:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-16 12:46:16,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:16,871 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:16,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-16 12:46:17,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:17,075 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:46:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:17,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1843697691, now seen corresponding path program 42 times [2022-11-16 12:46:17,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:17,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054826543] [2022-11-16 12:46:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:17,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 800 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:20,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:20,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054826543] [2022-11-16 12:46:20,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054826543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:20,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227696416] [2022-11-16 12:46:20,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:46:20,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:20,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:20,523 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:20,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-16 12:46:28,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-11-16 12:46:28,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:46:28,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 168 conjunts are in the unsatisfiable core [2022-11-16 12:46:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:28,223 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 [2022-11-16 12:46:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 882 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:30,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 882 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:35,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227696416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:35,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:46:35,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 145 [2022-11-16 12:46:35,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618572972] [2022-11-16 12:46:35,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:35,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-11-16 12:46:35,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-11-16 12:46:35,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2955, Invalid=18215, Unknown=0, NotChecked=0, Total=21170 [2022-11-16 12:46:35,149 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 146 states, 145 states have (on average 4.144827586206897) internal successors, (601), 146 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:40,226 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2022-11-16 12:46:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 12:46:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 4.144827586206897) internal successors, (601), 146 states have internal predecessors, (601), 0 states have call successors, (0), 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 203 [2022-11-16 12:46:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:40,228 INFO L225 Difference]: With dead ends: 211 [2022-11-16 12:46:40,228 INFO L226 Difference]: Without dead ends: 211 [2022-11-16 12:46:40,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10306 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=7637, Invalid=29419, Unknown=0, NotChecked=0, Total=37056 [2022-11-16 12:46:40,230 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 572 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 2999 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 3075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:40,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 2133 Invalid, 3075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2999 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:46:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-16 12:46:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2022-11-16 12:46:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0144230769230769) internal successors, (211), 208 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2022-11-16 12:46:40,234 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 203 [2022-11-16 12:46:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:40,235 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2022-11-16 12:46:40,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 4.144827586206897) internal successors, (601), 146 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2022-11-16 12:46:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-16 12:46:40,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:40,236 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:40,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:40,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:40,446 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:46:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash -804977611, now seen corresponding path program 43 times [2022-11-16 12:46:40,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:40,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913639226] [2022-11-16 12:46:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:40,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 44 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:42,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:42,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913639226] [2022-11-16 12:46:42,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913639226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:42,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295516030] [2022-11-16 12:46:42,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:46:42,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:42,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:42,564 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:42,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-16 12:46:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:43,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 12:46:43,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 44 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:44,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 44 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:48,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295516030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:48,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:46:48,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-16 12:46:48,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807239031] [2022-11-16 12:46:48,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:48,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-16 12:46:48,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:48,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-16 12:46:48,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=9640, Unknown=0, NotChecked=0, Total=9900 [2022-11-16 12:46:48,210 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 100 states, 100 states have (on average 4.16) internal successors, (416), 100 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:54,415 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2022-11-16 12:46:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 12:46:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 4.16) internal successors, (416), 100 states have internal predecessors, (416), 0 states have call successors, (0), 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 208 [2022-11-16 12:46:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:54,416 INFO L225 Difference]: With dead ends: 328 [2022-11-16 12:46:54,416 INFO L226 Difference]: Without dead ends: 216 [2022-11-16 12:46:54,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2378 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=603, Invalid=20277, Unknown=0, NotChecked=0, Total=20880 [2022-11-16 12:46:54,417 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 389 mSDsluCounter, 7549 mSDsCounter, 0 mSdLazyCounter, 6365 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 7665 SdHoareTripleChecker+Invalid, 6389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 6365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:54,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 7665 Invalid, 6389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 6365 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 12:46:54,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-16 12:46:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2022-11-16 12:46:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2022-11-16 12:46:54,421 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 208 [2022-11-16 12:46:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:54,421 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2022-11-16 12:46:54,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 4.16) internal successors, (416), 100 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2022-11-16 12:46:54,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-16 12:46:54,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:54,423 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:54,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-16 12:46:54,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-16 12:46:54,631 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:46:54,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash -495489966, now seen corresponding path program 44 times [2022-11-16 12:46:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:54,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582735349] [2022-11-16 12:46:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:54,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 882 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:58,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582735349] [2022-11-16 12:46:58,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582735349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397499814] [2022-11-16 12:46:58,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:46:58,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:58,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:58,242 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:58,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-16 12:46:58,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:46:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:46:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 217 conjunts are in the unsatisfiable core [2022-11-16 12:46:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:58,556 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 [2022-11-16 12:47:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 968 proven. 1266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:00,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 968 proven. 1266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:04,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397499814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:04,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:47:04,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 128 [2022-11-16 12:47:04,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555971676] [2022-11-16 12:47:04,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:04,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-11-16 12:47:04,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:04,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-11-16 12:47:04,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2133, Invalid=14379, Unknown=0, NotChecked=0, Total=16512 [2022-11-16 12:47:04,363 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 129 states, 128 states have (on average 4.046875) internal successors, (518), 129 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:09,882 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2022-11-16 12:47:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-16 12:47:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 128 states have (on average 4.046875) internal successors, (518), 129 states have internal predecessors, (518), 0 states have call successors, (0), 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 212 [2022-11-16 12:47:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:09,884 INFO L225 Difference]: With dead ends: 220 [2022-11-16 12:47:09,884 INFO L226 Difference]: Without dead ends: 220 [2022-11-16 12:47:09,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7606 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=6599, Invalid=24907, Unknown=0, NotChecked=0, Total=31506 [2022-11-16 12:47:09,887 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1006 mSDsluCounter, 3046 mSDsCounter, 0 mSdLazyCounter, 4658 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 3142 SdHoareTripleChecker+Invalid, 4686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:09,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 3142 Invalid, 4686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4658 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 12:47:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-16 12:47:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2022-11-16 12:47:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.0138248847926268) internal successors, (220), 217 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2022-11-16 12:47:09,891 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 212 [2022-11-16 12:47:09,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:09,891 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2022-11-16 12:47:09,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 128 states have (on average 4.046875) internal successors, (518), 129 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2022-11-16 12:47:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-16 12:47:09,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:09,893 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:09,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:10,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-16 12:47:10,100 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:47:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash -427050008, now seen corresponding path program 45 times [2022-11-16 12:47:10,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:10,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143867579] [2022-11-16 12:47:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:10,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 46 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:12,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:12,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143867579] [2022-11-16 12:47:12,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143867579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:12,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132076020] [2022-11-16 12:47:12,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:47:12,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:12,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:12,425 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:12,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-16 12:47:22,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-16 12:47:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:47:22,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-16 12:47:22,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 46 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:23,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 76 proven. 2270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:12,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132076020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:12,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:51:12,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 55, 55] total 110 [2022-11-16 12:51:12,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772450750] [2022-11-16 12:51:12,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:12,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-16 12:51:12,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:12,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-16 12:51:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=11511, Unknown=20, NotChecked=0, Total=11990 [2022-11-16 12:51:12,353 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand has 110 states, 110 states have (on average 4.0) internal successors, (440), 110 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:53,907 INFO L93 Difference]: Finished difference Result 342 states and 344 transitions. [2022-11-16 12:51:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-16 12:51:53,907 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 4.0) internal successors, (440), 110 states have internal predecessors, (440), 0 states have call successors, (0), 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 217 [2022-11-16 12:51:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:53,909 INFO L225 Difference]: With dead ends: 342 [2022-11-16 12:51:53,909 INFO L226 Difference]: Without dead ends: 225 [2022-11-16 12:51:53,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 207.5s TimeCoverageRelationStatistics Valid=1013, Invalid=24727, Unknown=20, NotChecked=0, Total=25760 [2022-11-16 12:51:53,911 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 316 mSDsluCounter, 6707 mSDsCounter, 0 mSdLazyCounter, 6180 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 6825 SdHoareTripleChecker+Invalid, 6220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 6180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:53,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 6825 Invalid, 6220 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [40 Valid, 6180 Invalid, 0 Unknown, 0 Unchecked, 22.8s Time] [2022-11-16 12:51:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-16 12:51:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2022-11-16 12:51:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0135746606334841) internal successors, (224), 221 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2022-11-16 12:51:53,914 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 217 [2022-11-16 12:51:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:53,914 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2022-11-16 12:51:53,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 4.0) internal successors, (440), 110 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2022-11-16 12:51:53,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-16 12:51:53,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:53,916 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:53,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-16 12:51:54,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:54,126 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:51:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:54,126 INFO L85 PathProgramCache]: Analyzing trace with hash -157277077, now seen corresponding path program 46 times [2022-11-16 12:51:54,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:54,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222872523] [2022-11-16 12:51:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:54,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 968 proven. 1471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:57,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:57,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222872523] [2022-11-16 12:51:57,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222872523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:57,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308916910] [2022-11-16 12:51:57,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:51:57,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:57,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:57,656 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:51:57,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-16 12:51:59,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:51:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:51:59,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 228 conjunts are in the unsatisfiable core [2022-11-16 12:51:59,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 1058 proven. 1381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:01,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:03,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 12:52:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 1058 proven. 1381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:05,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308916910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:05,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:05,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 131 [2022-11-16 12:52:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038135248] [2022-11-16 12:52:05,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:05,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-11-16 12:52:05,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:05,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-11-16 12:52:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2322, Invalid=14970, Unknown=0, NotChecked=0, Total=17292 [2022-11-16 12:52:05,421 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand has 132 states, 131 states have (on average 4.122137404580153) internal successors, (540), 132 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:52:10,417 INFO L93 Difference]: Finished difference Result 229 states and 231 transitions. [2022-11-16 12:52:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-16 12:52:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 131 states have (on average 4.122137404580153) internal successors, (540), 132 states have internal predecessors, (540), 0 states have call successors, (0), 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 221 [2022-11-16 12:52:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:52:10,419 INFO L225 Difference]: With dead ends: 229 [2022-11-16 12:52:10,419 INFO L226 Difference]: Without dead ends: 229 [2022-11-16 12:52:10,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8055 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=7145, Invalid=26161, Unknown=0, NotChecked=0, Total=33306 [2022-11-16 12:52:10,423 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1042 mSDsluCounter, 2859 mSDsCounter, 0 mSdLazyCounter, 4250 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 4278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:52:10,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 2959 Invalid, 4278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4250 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 12:52:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-16 12:52:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2022-11-16 12:52:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2022-11-16 12:52:10,427 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 221 [2022-11-16 12:52:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:52:10,428 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2022-11-16 12:52:10,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 131 states have (on average 4.122137404580153) internal successors, (540), 132 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2022-11-16 12:52:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-16 12:52:10,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:52:10,430 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:10,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:10,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-16 12:52:10,638 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:52:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1371482991, now seen corresponding path program 47 times [2022-11-16 12:52:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501240221] [2022-11-16 12:52:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 48 proven. 2508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:13,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501240221] [2022-11-16 12:52:13,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501240221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378998168] [2022-11-16 12:52:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:52:13,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:13,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:13,579 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:13,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-16 12:53:18,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-11-16 12:53:18,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:18,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-16 12:53:18,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 48 proven. 2508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:19,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 48 proven. 2508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:24,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378998168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:24,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:53:24,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 108 [2022-11-16 12:53:24,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693508942] [2022-11-16 12:53:24,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:24,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-16 12:53:24,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:24,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-16 12:53:24,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=11276, Unknown=0, NotChecked=0, Total=11556 [2022-11-16 12:53:24,640 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand has 108 states, 108 states have (on average 4.185185185185185) internal successors, (452), 108 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:32,776 INFO L93 Difference]: Finished difference Result 356 states and 358 transitions. [2022-11-16 12:53:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-16 12:53:32,777 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 4.185185185185185) internal successors, (452), 108 states have internal predecessors, (452), 0 states have call successors, (0), 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 226 [2022-11-16 12:53:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:32,778 INFO L225 Difference]: With dead ends: 356 [2022-11-16 12:53:32,778 INFO L226 Difference]: Without dead ends: 234 [2022-11-16 12:53:32,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2784 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=653, Invalid=23839, Unknown=0, NotChecked=0, Total=24492 [2022-11-16 12:53:32,780 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 305 mSDsluCounter, 9630 mSDsCounter, 0 mSdLazyCounter, 8153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 9756 SdHoareTripleChecker+Invalid, 8180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 8153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:32,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 9756 Invalid, 8180 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 8153 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 12:53:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-16 12:53:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2022-11-16 12:53:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2022-11-16 12:53:32,784 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 226 [2022-11-16 12:53:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:32,784 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2022-11-16 12:53:32,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 4.185185185185185) internal successors, (452), 108 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2022-11-16 12:53:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-16 12:53:32,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:32,786 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:32,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:32,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-16 12:53:32,986 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:53:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash -273373620, now seen corresponding path program 48 times [2022-11-16 12:53:32,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66181963] [2022-11-16 12:53:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:32,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 1058 proven. 1595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:37,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:37,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66181963] [2022-11-16 12:53:37,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66181963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:37,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431954655] [2022-11-16 12:53:37,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:53:37,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:37,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:37,833 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:37,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-16 12:53:59,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-11-16 12:53:59,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:59,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 186 conjunts are in the unsatisfiable core [2022-11-16 12:54:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 1152 proven. 1501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:03,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:54:06,393 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 5 [2022-11-16 12:54:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 1152 proven. 1501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:07,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431954655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:54:07,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:54:07,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 138 [2022-11-16 12:54:07,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913706401] [2022-11-16 12:54:07,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:54:07,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-11-16 12:54:07,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:54:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-11-16 12:54:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2765, Invalid=16417, Unknown=0, NotChecked=0, Total=19182 [2022-11-16 12:54:07,621 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 139 states, 138 states have (on average 4.231884057971015) internal successors, (584), 139 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:13,569 INFO L93 Difference]: Finished difference Result 238 states and 240 transitions. [2022-11-16 12:54:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-16 12:54:13,570 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 138 states have (on average 4.231884057971015) internal successors, (584), 139 states have internal predecessors, (584), 0 states have call successors, (0), 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 230 [2022-11-16 12:54:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:13,571 INFO L225 Difference]: With dead ends: 238 [2022-11-16 12:54:13,571 INFO L226 Difference]: Without dead ends: 238 [2022-11-16 12:54:13,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 351 SyntacticMatches, 25 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12002 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=7358, Invalid=29314, Unknown=0, NotChecked=0, Total=36672 [2022-11-16 12:54:13,573 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1441 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 3077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:13,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 2282 Invalid, 3077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:54:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-16 12:54:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2022-11-16 12:54:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0127659574468084) internal successors, (238), 235 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2022-11-16 12:54:13,577 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 230 [2022-11-16 12:54:13,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:13,577 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2022-11-16 12:54:13,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 138 states have (on average 4.231884057971015) internal successors, (584), 139 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2022-11-16 12:54:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-16 12:54:13,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:13,579 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:13,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-16 12:54:13,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-16 12:54:13,791 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-16 12:54:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2042253778, now seen corresponding path program 49 times [2022-11-16 12:54:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:54:13,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246461722] [2022-11-16 12:54:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:54:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 50 proven. 2725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:16,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:54:16,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246461722] [2022-11-16 12:54:16,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246461722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:54:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051203279] [2022-11-16 12:54:16,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:54:16,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:16,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:54:16,482 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:54:16,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a374954-4bc7-411c-9a8a-6eae041d1abf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-16 12:54:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-16 12:54:18,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 50 proven. 2725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:19,497 INFO L328 TraceCheckSpWp]: Computing backward predicates...