./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-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_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/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_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/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_4da79210-0f58-4f3a-8753-9d13117ea300/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 d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- 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 11:44:25,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:44:25,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:44:25,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:44:25,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:44:25,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:44:25,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:44:25,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:44:25,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:44:25,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:44:25,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:44:26,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:44:26,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:44:26,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:44:26,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:44:26,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:44:26,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:44:26,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:44:26,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:44:26,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:44:26,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:44:26,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:44:26,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:44:26,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:44:26,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:44:26,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:44:26,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:44:26,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:44:26,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:44:26,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:44:26,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:44:26,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:44:26,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:44:26,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:44:26,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:44:26,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:44:26,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:44:26,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:44:26,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:44:26,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:44:26,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:44:26,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:44:26,090 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:44:26,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:44:26,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:44:26,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:44:26,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:44:26,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:44:26,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:44:26,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:44:26,093 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:44:26,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:44:26,094 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:44:26,094 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:44:26,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:44:26,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:44:26,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:44:26,098 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:44:26,098 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:44:26,099 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:44:26,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:44:26,099 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:44:26,099 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:44:26,100 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:44:26,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:44:26,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:44:26,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:44:26,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:44:26,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:44:26,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:44:26,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:44:26,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:44:26,103 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_4da79210-0f58-4f3a-8753-9d13117ea300/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2022-11-16 11:44:26,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:44:26,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:44:26,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:44:26,426 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:44:26,427 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:44:26,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2022-11-16 11:44:26,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/data/f46c2948a/e7f2d1d04de44cf7937035efef6ef2f9/FLAG332c1f59d [2022-11-16 11:44:26,970 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:44:26,971 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2022-11-16 11:44:26,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/data/f46c2948a/e7f2d1d04de44cf7937035efef6ef2f9/FLAG332c1f59d [2022-11-16 11:44:27,323 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/data/f46c2948a/e7f2d1d04de44cf7937035efef6ef2f9 [2022-11-16 11:44:27,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:44:27,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:44:27,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:44:27,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:44:27,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:44:27,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68782640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27, skipping insertion in model container [2022-11-16 11:44:27,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:44:27,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:44:27,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:44:27,676 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:44:27,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:44:27,739 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:44:27,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27 WrapperNode [2022-11-16 11:44:27,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:44:27,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:44:27,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:44:27,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:44:27,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,811 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2022-11-16 11:44:27,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:44:27,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:44:27,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:44:27,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:44:27,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,855 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:44:27,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:44:27,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:44:27,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:44:27,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (1/1) ... [2022-11-16 11:44:27,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:44:27,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:27,907 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:44:27,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:44:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:44:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:44:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:44:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:44:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:44:27,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:44:28,074 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:44:28,077 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:44:28,247 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:44:28,253 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:44:28,253 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:44:28,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:44:28 BoogieIcfgContainer [2022-11-16 11:44:28,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:44:28,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:44:28,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:44:28,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:44:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:44:27" (1/3) ... [2022-11-16 11:44:28,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d8699f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:44:28, skipping insertion in model container [2022-11-16 11:44:28,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:44:27" (2/3) ... [2022-11-16 11:44:28,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d8699f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:44:28, skipping insertion in model container [2022-11-16 11:44:28,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:44:28" (3/3) ... [2022-11-16 11:44:28,265 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2022-11-16 11:44:28,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:44:28,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-16 11:44:28,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:28,352 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;@39cb6558, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:28,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-16 11:44:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 11:44:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:44:28,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:28,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:28,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:28,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-11-16 11:44:28,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:28,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188382546] [2022-11-16 11:44:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:28,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:28,811 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 11:44:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:28,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188382546] [2022-11-16 11:44:28,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188382546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:28,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:28,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:28,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932795661] [2022-11-16 11:44:28,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:28,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:28,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:28,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:28,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:28,854 INFO L87 Difference]: Start difference. First operand has 44 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:28,905 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-11-16 11:44:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:44:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:28,916 INFO L225 Difference]: With dead ends: 42 [2022-11-16 11:44:28,916 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 11:44:28,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:28,921 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:28,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 11:44:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-16 11:44:28,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-16 11:44:28,955 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 7 [2022-11-16 11:44:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:28,956 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-16 11:44:28,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-16 11:44:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:44:28,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:28,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:28,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:44:28,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:28,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-11-16 11:44:28,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:28,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32530907] [2022-11-16 11:44:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:29,351 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 11:44:29,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:29,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32530907] [2022-11-16 11:44:29,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32530907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:29,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:29,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:44:29,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888266861] [2022-11-16 11:44:29,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:29,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:44:29,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:44:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:44:29,355 INFO L87 Difference]: Start difference. First operand 40 states and 46 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 11:44:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:29,472 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-11-16 11:44:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:44:29,473 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 11:44:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:29,474 INFO L225 Difference]: With dead ends: 81 [2022-11-16 11:44:29,475 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 11:44:29,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:44:29,478 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 47 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:29,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 11:44:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 44. [2022-11-16 11:44:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 11:44:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-16 11:44:29,493 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2022-11-16 11:44:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:29,494 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-16 11:44:29,495 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 11:44:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-16 11:44:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:44:29,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:29,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:29,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:44:29,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-11-16 11:44:29,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:29,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994786767] [2022-11-16 11:44:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:29,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:29,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:29,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994786767] [2022-11-16 11:44:29,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994786767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:29,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:29,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:44:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591383933] [2022-11-16 11:44:29,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:29,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:29,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:29,770 INFO L87 Difference]: Start difference. First operand 44 states and 51 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 11:44:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:29,853 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-11-16 11:44:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:44:29,854 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 11:44:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:29,855 INFO L225 Difference]: With dead ends: 48 [2022-11-16 11:44:29,855 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 11:44:29,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:29,856 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:29,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 90 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 11:44:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-16 11:44:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 11:44:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-16 11:44:29,862 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2022-11-16 11:44:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:29,862 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-16 11:44:29,863 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 11:44:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-16 11:44:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:44:29,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:29,864 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:29,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:44:29,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:29,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:29,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2022-11-16 11:44:29,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:29,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113732961] [2022-11-16 11:44:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:29,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:29,980 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 11:44:29,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:29,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113732961] [2022-11-16 11:44:29,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113732961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:29,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936148217] [2022-11-16 11:44:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:29,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:29,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:29,986 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:30,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:44:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:30,206 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 11:44:30,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:44:30,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936148217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:30,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:44:30,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:44:30,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465682273] [2022-11-16 11:44:30,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:30,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:44:30,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:30,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:44:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:44:30,209 INFO L87 Difference]: Start difference. First operand 42 states and 48 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 11:44:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:30,252 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2022-11-16 11:44:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:44:30,253 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 11:44:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:30,254 INFO L225 Difference]: With dead ends: 79 [2022-11-16 11:44:30,254 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 11:44:30,254 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 11:44:30,255 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:30,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 113 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 11:44:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2022-11-16 11:44:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 11:44:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-16 11:44:30,262 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-11-16 11:44:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:30,262 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-16 11:44:30,262 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 11:44:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-16 11:44:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:44:30,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:30,263 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:30,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:30,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:30,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-11-16 11:44:30,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:30,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933798484] [2022-11-16 11:44:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:30,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:30,784 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 11:44:30,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:30,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933798484] [2022-11-16 11:44:30,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933798484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:30,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237079166] [2022-11-16 11:44:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:30,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:30,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:30,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:30,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:44:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:30,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:44:30,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:30,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:44:30,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-16 11:44:30,992 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 10 treesize of output 8 [2022-11-16 11:44:31,209 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 11:44:31,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:31,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:44:31,551 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 11:44:31,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237079166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:31,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:31,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-11-16 11:44:31,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580622965] [2022-11-16 11:44:31,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:31,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:44:31,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:44:31,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:44:31,561 INFO L87 Difference]: Start difference. First operand 49 states and 56 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 11:44:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:31,804 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-16 11:44:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:44:31,805 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 11:44:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:31,806 INFO L225 Difference]: With dead ends: 50 [2022-11-16 11:44:31,806 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 11:44:31,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:44:31,808 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 166 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:31,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 88 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 11:44:31,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-11-16 11:44:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 11:44:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-16 11:44:31,814 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 11 [2022-11-16 11:44:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:31,814 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-16 11:44:31,815 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 11:44:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-16 11:44:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:44:31,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:31,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:31,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:32,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:32,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265437, now seen corresponding path program 1 times [2022-11-16 11:44:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:32,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775295198] [2022-11-16 11:44:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:32,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:32,071 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 11:44:32,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:32,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775295198] [2022-11-16 11:44:32,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775295198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:32,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:32,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:44:32,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741779196] [2022-11-16 11:44:32,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:32,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:44:32,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:44:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:44:32,074 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:32,100 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-11-16 11:44:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:44:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:44:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:32,102 INFO L225 Difference]: With dead ends: 53 [2022-11-16 11:44:32,102 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 11:44:32,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:44:32,103 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:32,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 73 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 11:44:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-11-16 11:44:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 11:44:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-16 11:44:32,108 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 13 [2022-11-16 11:44:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:32,109 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-16 11:44:32,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-16 11:44:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:44:32,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:32,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:32,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:44:32,111 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2022-11-16 11:44:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:32,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424627884] [2022-11-16 11:44:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:32,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:32,269 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 11:44:32,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:32,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424627884] [2022-11-16 11:44:32,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424627884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:32,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:32,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:44:32,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152457239] [2022-11-16 11:44:32,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:32,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:44:32,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:32,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:44:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:44:32,272 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:32,360 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2022-11-16 11:44:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:44:32,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:44:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:32,362 INFO L225 Difference]: With dead ends: 87 [2022-11-16 11:44:32,362 INFO L226 Difference]: Without dead ends: 87 [2022-11-16 11:44:32,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:32,363 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:32,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 78 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-16 11:44:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 46. [2022-11-16 11:44:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.394736842105263) internal successors, (53), 45 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 11:44:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-16 11:44:32,368 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2022-11-16 11:44:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:32,368 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-16 11:44:32,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-16 11:44:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:44:32,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:32,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:44:32,370 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2022-11-16 11:44:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:32,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303841137] [2022-11-16 11:44:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:32,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:32,552 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 11:44:32,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:32,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303841137] [2022-11-16 11:44:32,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303841137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:32,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:32,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:44:32,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125604641] [2022-11-16 11:44:32,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:32,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:32,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:32,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:32,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:32,555 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:32,639 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-11-16 11:44:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:44:32,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:44:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:32,641 INFO L225 Difference]: With dead ends: 89 [2022-11-16 11:44:32,641 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 11:44:32,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:32,642 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:32,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 114 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 11:44:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-11-16 11:44:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 66 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 11:44:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-16 11:44:32,648 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 13 [2022-11-16 11:44:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:32,648 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-16 11:44:32,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-16 11:44:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:44:32,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:32,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:32,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:44:32,650 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1811674902, now seen corresponding path program 1 times [2022-11-16 11:44:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:32,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085641823] [2022-11-16 11:44:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:32,819 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 11:44:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085641823] [2022-11-16 11:44:32,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085641823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:32,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:32,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822736523] [2022-11-16 11:44:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:32,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:44:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:44:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:44:32,823 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:32,922 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-11-16 11:44:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:32,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:44:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:32,923 INFO L225 Difference]: With dead ends: 72 [2022-11-16 11:44:32,923 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 11:44:32,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:44:32,924 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:32,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 76 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 11:44:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-11-16 11:44:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 67 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-11-16 11:44:32,929 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 13 [2022-11-16 11:44:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:32,930 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-11-16 11:44:32,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-11-16 11:44:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:44:32,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:32,931 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 11:44:32,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:44:32,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:32,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash -862198810, now seen corresponding path program 1 times [2022-11-16 11:44:32,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:32,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701739550] [2022-11-16 11:44:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:32,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:33,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:33,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701739550] [2022-11-16 11:44:33,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701739550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:33,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569812309] [2022-11-16 11:44:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:33,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:33,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:33,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:33,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:44:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:33,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:44:33,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:33,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:33,354 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 11:44:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:33,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569812309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:33,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:33,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-16 11:44:33,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500559022] [2022-11-16 11:44:33,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:33,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:33,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:33,444 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:33,606 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2022-11-16 11:44:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:33,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:44:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:33,607 INFO L225 Difference]: With dead ends: 106 [2022-11-16 11:44:33,607 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 11:44:33,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:44:33,608 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 146 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:33,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 163 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 11:44:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-11-16 11:44:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 11:44:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2022-11-16 11:44:33,624 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 17 [2022-11-16 11:44:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:33,625 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2022-11-16 11:44:33,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2022-11-16 11:44:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:44:33,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:33,626 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:33,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:33,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:33,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:33,828 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2022-11-16 11:44:33,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:33,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217572717] [2022-11-16 11:44:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:33,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:33,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217572717] [2022-11-16 11:44:33,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217572717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:33,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868647006] [2022-11-16 11:44:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:33,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:33,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:33,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:33,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:44:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:33,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:33,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:34,035 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 11:44:34,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:44:34,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868647006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:34,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:44:34,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:44:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673070501] [2022-11-16 11:44:34,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:34,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:44:34,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:34,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:44:34,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:44:34,038 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 11:44:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:34,065 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-11-16 11:44:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:44:34,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 11:44:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:34,066 INFO L225 Difference]: With dead ends: 101 [2022-11-16 11:44:34,066 INFO L226 Difference]: Without dead ends: 101 [2022-11-16 11:44:34,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 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 11:44:34,067 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:34,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 83 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-16 11:44:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2022-11-16 11:44:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 81 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2022-11-16 11:44:34,077 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 17 [2022-11-16 11:44:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:34,077 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2022-11-16 11:44:34,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 11:44:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2022-11-16 11:44:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:44:34,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:34,078 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:34,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:34,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:44:34,284 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:34,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2022-11-16 11:44:34,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:34,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494121406] [2022-11-16 11:44:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:34,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:34,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494121406] [2022-11-16 11:44:34,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494121406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278904005] [2022-11-16 11:44:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:34,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:34,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:34,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:34,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:44:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:34,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:44:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:34,656 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:44:34,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-16 11:44:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:34,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:35,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278904005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:35,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:35,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-16 11:44:35,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102188412] [2022-11-16 11:44:35,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:35,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:44:35,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:44:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:44:35,257 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 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 11:44:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:35,494 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-11-16 11:44:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:35,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 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) Word has length 17 [2022-11-16 11:44:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:35,496 INFO L225 Difference]: With dead ends: 85 [2022-11-16 11:44:35,496 INFO L226 Difference]: Without dead ends: 85 [2022-11-16 11:44:35,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:44:35,497 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 175 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:35,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 131 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-16 11:44:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-11-16 11:44:35,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 78 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 11:44:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2022-11-16 11:44:35,500 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 17 [2022-11-16 11:44:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:35,501 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2022-11-16 11:44:35,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 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 11:44:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2022-11-16 11:44:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:44:35,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:35,502 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 11:44:35,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:35,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:44:35,703 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2142062488, now seen corresponding path program 1 times [2022-11-16 11:44:35,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:35,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404565878] [2022-11-16 11:44:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:35,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:35,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:35,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404565878] [2022-11-16 11:44:35,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404565878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:35,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:35,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:35,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685781970] [2022-11-16 11:44:35,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:35,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:44:35,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:44:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:44:35,823 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 11:44:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:35,879 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2022-11-16 11:44:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:35,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 11:44:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:35,880 INFO L225 Difference]: With dead ends: 78 [2022-11-16 11:44:35,881 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 11:44:35,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:44:35,882 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:35,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 11:44:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-11-16 11:44:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-11-16 11:44:35,907 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 17 [2022-11-16 11:44:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:35,907 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-11-16 11:44:35,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 11:44:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-11-16 11:44:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:44:35,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:35,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:35,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:44:35,910 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2056744278, now seen corresponding path program 1 times [2022-11-16 11:44:35,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:35,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28590781] [2022-11-16 11:44:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:35,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:36,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:36,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28590781] [2022-11-16 11:44:36,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28590781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:36,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:36,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:36,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344644695] [2022-11-16 11:44:36,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:36,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:44:36,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:36,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:44:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:44:36,074 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:36,130 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-11-16 11:44:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:44:36,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:44:36,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:36,131 INFO L225 Difference]: With dead ends: 64 [2022-11-16 11:44:36,132 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 11:44:36,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:44:36,133 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:36,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 69 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 11:44:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2022-11-16 11:44:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-11-16 11:44:36,136 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 18 [2022-11-16 11:44:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:36,137 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-11-16 11:44:36,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-11-16 11:44:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:44:36,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:36,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:36,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:44:36,139 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1835484247, now seen corresponding path program 1 times [2022-11-16 11:44:36,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:36,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720920642] [2022-11-16 11:44:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:36,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:36,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720920642] [2022-11-16 11:44:36,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720920642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:36,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:36,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:44:36,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362859120] [2022-11-16 11:44:36,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:36,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:44:36,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:44:36,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:44:36,246 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:36,293 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-16 11:44:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:44:36,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:44:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:36,295 INFO L225 Difference]: With dead ends: 60 [2022-11-16 11:44:36,295 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 11:44:36,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:44:36,298 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 64 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 11:44:36,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 64 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 11:44:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-16 11:44:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-11-16 11:44:36,301 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 21 [2022-11-16 11:44:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:36,302 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-11-16 11:44:36,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-11-16 11:44:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:44:36,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:36,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:36,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:44:36,307 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:36,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1835484246, now seen corresponding path program 1 times [2022-11-16 11:44:36,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:36,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088758849] [2022-11-16 11:44:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088758849] [2022-11-16 11:44:36,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088758849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235558007] [2022-11-16 11:44:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:36,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:36,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:36,503 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:36,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:44:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:36,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:44:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:36,649 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:44:36,649 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 11:44:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:36,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:37,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235558007] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:37,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:44:37,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 8] total 20 [2022-11-16 11:44:37,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327281354] [2022-11-16 11:44:37,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:37,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:44:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:44:37,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:44:37,173 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:37,349 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-11-16 11:44:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:44:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:44:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:37,350 INFO L225 Difference]: With dead ends: 93 [2022-11-16 11:44:37,350 INFO L226 Difference]: Without dead ends: 93 [2022-11-16 11:44:37,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:44:37,352 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 116 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:37,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 182 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-16 11:44:37,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2022-11-16 11:44:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.178082191780822) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-11-16 11:44:37,359 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 21 [2022-11-16 11:44:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:37,359 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-11-16 11:44:37,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:37,360 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-11-16 11:44:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:44:37,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:37,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:37,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:37,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:44:37,569 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash 770539308, now seen corresponding path program 1 times [2022-11-16 11:44:37,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:37,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336939087] [2022-11-16 11:44:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:37,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:37,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:37,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336939087] [2022-11-16 11:44:37,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336939087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:37,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264142500] [2022-11-16 11:44:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:37,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:37,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:37,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:37,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:44:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:37,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:44:37,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:37,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:37,994 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 11:44:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:38,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264142500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:38,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:38,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-11-16 11:44:38,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867179770] [2022-11-16 11:44:38,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:38,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:44:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:44:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:44:38,017 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:38,202 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2022-11-16 11:44:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:44:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:44:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:38,203 INFO L225 Difference]: With dead ends: 87 [2022-11-16 11:44:38,203 INFO L226 Difference]: Without dead ends: 87 [2022-11-16 11:44:38,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:44:38,204 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 94 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:38,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 153 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-16 11:44:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2022-11-16 11:44:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.206896551724138) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-11-16 11:44:38,209 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 21 [2022-11-16 11:44:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:38,209 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-11-16 11:44:38,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-11-16 11:44:38,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:44:38,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:38,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:38,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:38,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:44:38,414 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:38,414 INFO L85 PathProgramCache]: Analyzing trace with hash -618546161, now seen corresponding path program 1 times [2022-11-16 11:44:38,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:38,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076235142] [2022-11-16 11:44:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:38,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076235142] [2022-11-16 11:44:38,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076235142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:38,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:38,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:44:38,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139929022] [2022-11-16 11:44:38,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:38,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:38,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:38,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:38,498 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 11:44:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:38,577 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-11-16 11:44:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:44:38,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-16 11:44:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:38,579 INFO L225 Difference]: With dead ends: 65 [2022-11-16 11:44:38,579 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 11:44:38,579 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 11:44:38,580 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:38,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 11:44:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-11-16 11:44:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-11-16 11:44:38,582 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 25 [2022-11-16 11:44:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:38,583 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-11-16 11:44:38,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 11:44:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-11-16 11:44:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:44:38,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:38,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:38,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:44:38,584 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:38,585 INFO L85 PathProgramCache]: Analyzing trace with hash -618546160, now seen corresponding path program 1 times [2022-11-16 11:44:38,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:38,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958214143] [2022-11-16 11:44:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:38,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:38,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:38,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958214143] [2022-11-16 11:44:38,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958214143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:38,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8252499] [2022-11-16 11:44:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:38,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:38,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:38,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:38,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:44:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:38,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:44:38,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:39,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:39,162 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 11:44:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:39,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8252499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:39,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:39,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-16 11:44:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869206574] [2022-11-16 11:44:39,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:39,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:44:39,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:44:39,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:44:39,193 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:39,444 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-11-16 11:44:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:44:39,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-16 11:44:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:39,445 INFO L225 Difference]: With dead ends: 68 [2022-11-16 11:44:39,445 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 11:44:39,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:44:39,446 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:39,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 163 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 11:44:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-11-16 11:44:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 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 11:44:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-11-16 11:44:39,448 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 25 [2022-11-16 11:44:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:39,449 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-11-16 11:44:39,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-11-16 11:44:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:44:39,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:39,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:39,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:39,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:39,650 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1995099464, now seen corresponding path program 1 times [2022-11-16 11:44:39,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:39,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682585134] [2022-11-16 11:44:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:39,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:44:39,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:39,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682585134] [2022-11-16 11:44:39,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682585134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:39,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:39,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:39,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767092154] [2022-11-16 11:44:39,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:39,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:44:39,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:39,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:44:39,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:44:39,816 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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 11:44:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:39,848 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-11-16 11:44:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:44:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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) Word has length 26 [2022-11-16 11:44:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:39,849 INFO L225 Difference]: With dead ends: 62 [2022-11-16 11:44:39,849 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 11:44:39,850 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 11:44:39,850 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 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 11:44:39,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:44:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 11:44:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-16 11:44:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 11:44:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-11-16 11:44:39,852 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 26 [2022-11-16 11:44:39,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:39,853 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-11-16 11:44:39,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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 11:44:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-11-16 11:44:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:44:39,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:39,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:39,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:44:39,854 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:39,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1127339532, now seen corresponding path program 1 times [2022-11-16 11:44:39,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:39,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628303584] [2022-11-16 11:44:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:39,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:40,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:40,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628303584] [2022-11-16 11:44:40,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628303584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:40,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41580060] [2022-11-16 11:44:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:40,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:40,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:40,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:40,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:44:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:44:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:40,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:44:40,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:44:40,836 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-16 11:44:40,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-16 11:44:40,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:44:41,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:41,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:44:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:44:41,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:44:41,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41580060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:41,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:44:41,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2022-11-16 11:44:41,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345475245] [2022-11-16 11:44:41,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:41,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:44:41,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:41,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:44:41,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:44:41,052 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 11:44:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:41,144 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-11-16 11:44:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:44:41,145 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 11:44:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:41,145 INFO L225 Difference]: With dead ends: 80 [2022-11-16 11:44:41,145 INFO L226 Difference]: Without dead ends: 61 [2022-11-16 11:44:41,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:44:41,147 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:41,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 170 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-11-16 11:44:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-16 11:44:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-11-16 11:44:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-11-16 11:44:41,149 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 29 [2022-11-16 11:44:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:41,149 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-11-16 11:44:41,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 11:44:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-11-16 11:44:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:44:41,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:41,150 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:41,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:41,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:44:41,351 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:41,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1065299918, now seen corresponding path program 1 times [2022-11-16 11:44:41,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:41,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388707251] [2022-11-16 11:44:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:41,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:44:41,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:41,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388707251] [2022-11-16 11:44:41,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388707251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:41,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:41,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 11:44:41,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162841302] [2022-11-16 11:44:41,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:41,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:44:41,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:44:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:44:41,857 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 11:44:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:42,711 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-11-16 11:44:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:44:42,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 11:44:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:42,715 INFO L225 Difference]: With dead ends: 95 [2022-11-16 11:44:42,715 INFO L226 Difference]: Without dead ends: 95 [2022-11-16 11:44:42,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:44:42,716 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 142 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:42,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 264 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:44:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-16 11:44:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2022-11-16 11:44:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 69 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-11-16 11:44:42,719 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 29 [2022-11-16 11:44:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:42,719 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-11-16 11:44:42,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 11:44:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-11-16 11:44:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:44:42,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:42,720 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 11:44:42,720 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash 795888502, now seen corresponding path program 1 times [2022-11-16 11:44:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:42,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532090891] [2022-11-16 11:44:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:42,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:43,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:43,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532090891] [2022-11-16 11:44:43,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532090891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:43,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584747879] [2022-11-16 11:44:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:43,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:43,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:43,370 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:43,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:44:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:43,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 11:44:43,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:43,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:44:43,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:44:43,845 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-16 11:44:43,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-16 11:44:44,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:44:44,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:44,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:44:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:44,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:44,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-16 11:44:44,255 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 14 treesize of output 12 [2022-11-16 11:44:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:44,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584747879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:44,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:44,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 31 [2022-11-16 11:44:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119716817] [2022-11-16 11:44:44,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:44,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:44:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:44:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:44:44,388 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:45,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:45,146 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2022-11-16 11:44:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:44:45,147 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 11:44:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:45,147 INFO L225 Difference]: With dead ends: 121 [2022-11-16 11:44:45,148 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 11:44:45,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 11:44:45,149 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 195 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:45,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 426 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 379 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-11-16 11:44:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 11:44:45,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2022-11-16 11:44:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-11-16 11:44:45,152 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 29 [2022-11-16 11:44:45,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:45,152 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-11-16 11:44:45,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-11-16 11:44:45,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 11:44:45,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:45,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:45,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:45,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:45,360 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1769750649, now seen corresponding path program 2 times [2022-11-16 11:44:45,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676877366] [2022-11-16 11:44:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:45,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:45,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:45,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676877366] [2022-11-16 11:44:45,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676877366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:45,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397931473] [2022-11-16 11:44:45,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:44:45,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:45,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:45,617 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:45,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:44:45,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:44:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:44:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:44:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:45,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:46,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:44:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:46,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397931473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:46,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:46,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-11-16 11:44:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396303596] [2022-11-16 11:44:46,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:46,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:44:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:44:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:44:46,160 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 20 states, 19 states have (on average 3.526315789473684) internal successors, (67), 20 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 11:44:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:46,449 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-11-16 11:44:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:44:46,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.526315789473684) internal successors, (67), 20 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) Word has length 33 [2022-11-16 11:44:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:46,450 INFO L225 Difference]: With dead ends: 70 [2022-11-16 11:44:46,450 INFO L226 Difference]: Without dead ends: 70 [2022-11-16 11:44:46,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:44:46,451 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 237 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:46,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 142 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-16 11:44:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-11-16 11:44:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-11-16 11:44:46,454 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 33 [2022-11-16 11:44:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:46,454 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-11-16 11:44:46,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.526315789473684) internal successors, (67), 20 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 11:44:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-11-16 11:44:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:44:46,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:46,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:46,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:46,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:46,655 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash -972218812, now seen corresponding path program 1 times [2022-11-16 11:44:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:46,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544322306] [2022-11-16 11:44:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:46,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:46,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544322306] [2022-11-16 11:44:46,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544322306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:46,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533028395] [2022-11-16 11:44:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:46,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:46,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:46,981 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:47,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:44:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:44:47,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:47,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:44:47,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:47,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-16 11:44:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:47,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:48,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:44:48,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 11:44:48,270 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 50 treesize of output 42 [2022-11-16 11:44:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:48,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533028395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:48,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:48,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-16 11:44:48,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717815671] [2022-11-16 11:44:48,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:48,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:44:48,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:48,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:44:48,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:44:48,389 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:48,931 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-11-16 11:44:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:44:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 11:44:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:48,933 INFO L225 Difference]: With dead ends: 78 [2022-11-16 11:44:48,933 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 11:44:48,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=1770, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:44:48,934 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:48,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 280 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-11-16 11:44:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 11:44:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-11-16 11:44:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 11:44:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-11-16 11:44:48,938 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 34 [2022-11-16 11:44:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:48,938 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-11-16 11:44:48,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-11-16 11:44:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:44:48,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:48,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:48,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:44:49,145 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -270618938, now seen corresponding path program 1 times [2022-11-16 11:44:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:49,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034808395] [2022-11-16 11:44:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:49,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034808395] [2022-11-16 11:44:49,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034808395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808114858] [2022-11-16 11:44:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:49,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:49,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:49,494 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:49,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:44:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:44:49,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:49,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:44:49,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:44:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:49,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:49,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-16 11:44:49,797 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 14 treesize of output 12 [2022-11-16 11:44:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:49,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808114858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:49,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:49,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2022-11-16 11:44:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722373130] [2022-11-16 11:44:49,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:49,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:44:49,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:44:49,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:44:49,925 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 11:44:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:50,350 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2022-11-16 11:44:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:44:50,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) Word has length 34 [2022-11-16 11:44:50,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:50,352 INFO L225 Difference]: With dead ends: 106 [2022-11-16 11:44:50,352 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 11:44:50,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:44:50,353 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 212 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:50,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 229 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:44:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 11:44:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2022-11-16 11:44:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.125) internal successors, (99), 89 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 11:44:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-11-16 11:44:50,355 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 34 [2022-11-16 11:44:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:50,355 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-11-16 11:44:50,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 11:44:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-11-16 11:44:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 11:44:50,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:50,356 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:50,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:50,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:44:50,557 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:50,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1855891613, now seen corresponding path program 2 times [2022-11-16 11:44:50,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:50,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403496026] [2022-11-16 11:44:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:50,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:50,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403496026] [2022-11-16 11:44:50,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403496026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279203513] [2022-11-16 11:44:50,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:44:50,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:50,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:50,957 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:50,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:44:51,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:44:51,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:44:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:44:51,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:51,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:51,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:44:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:51,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279203513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:51,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:51,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-11-16 11:44:51,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653130945] [2022-11-16 11:44:51,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:51,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:44:51,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:51,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:44:51,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:44:51,489 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:52,089 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2022-11-16 11:44:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:44:52,090 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-16 11:44:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:52,090 INFO L225 Difference]: With dead ends: 113 [2022-11-16 11:44:52,090 INFO L226 Difference]: Without dead ends: 113 [2022-11-16 11:44:52,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:44:52,091 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 192 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:52,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 336 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:44:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-16 11:44:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2022-11-16 11:44:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 11:44:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2022-11-16 11:44:52,094 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 38 [2022-11-16 11:44:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:52,094 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2022-11-16 11:44:52,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2022-11-16 11:44:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:44:52,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:52,095 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:52,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:52,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:44:52,301 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:44:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash 759394243, now seen corresponding path program 3 times [2022-11-16 11:44:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:52,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877772629] [2022-11-16 11:44:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:52,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:52,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:52,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877772629] [2022-11-16 11:44:52,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877772629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:52,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144234468] [2022-11-16 11:44:52,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:44:52,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:52,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:52,931 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:52,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:44:53,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:44:53,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:44:53,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 11:44:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:53,178 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:53,178 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:44:53,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:44:53,596 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:53,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-16 11:44:53,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-11-16 11:44:54,430 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:44:54,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:44:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:54,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:57,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:57,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:44:57,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:57,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-16 11:44:57,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:57,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-11-16 11:44:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:58,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144234468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:58,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:58,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 20] total 46 [2022-11-16 11:44:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010528449] [2022-11-16 11:44:58,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:58,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:44:58,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:44:58,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1927, Unknown=1, NotChecked=0, Total=2070 [2022-11-16 11:44:58,893 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 46 states, 46 states have (on average 2.369565217391304) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 11:45:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:01,742 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2022-11-16 11:45:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:45:01,742 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.369565217391304) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 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 11:45:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:01,743 INFO L225 Difference]: With dead ends: 206 [2022-11-16 11:45:01,743 INFO L226 Difference]: Without dead ends: 166 [2022-11-16 11:45:01,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=549, Invalid=4562, Unknown=1, NotChecked=0, Total=5112 [2022-11-16 11:45:01,745 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 460 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:01,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 495 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 378 Invalid, 0 Unknown, 353 Unchecked, 0.4s Time] [2022-11-16 11:45:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-16 11:45:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2022-11-16 11:45:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 136 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-11-16 11:45:01,749 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 41 [2022-11-16 11:45:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:01,749 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-11-16 11:45:01,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.369565217391304) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 11:45:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-11-16 11:45:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:45:01,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:01,751 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:01,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:01,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 11:45:01,956 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:01,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1122231478, now seen corresponding path program 3 times [2022-11-16 11:45:01,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:01,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561585010] [2022-11-16 11:45:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:01,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:02,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561585010] [2022-11-16 11:45:02,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561585010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417983552] [2022-11-16 11:45:02,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:45:02,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:02,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:02,519 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:02,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:45:02,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:45:02,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:02,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 11:45:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:02,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:03,087 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 11:45:03,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 11:45:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:03,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:03,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:45:03,256 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 16 treesize of output 12 [2022-11-16 11:45:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:03,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417983552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:03,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:03,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 33 [2022-11-16 11:45:03,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405430756] [2022-11-16 11:45:03,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:03,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:45:03,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:45:03,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:45:03,395 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:04,410 INFO L93 Difference]: Finished difference Result 207 states and 223 transitions. [2022-11-16 11:45:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:45:04,410 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-16 11:45:04,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:04,411 INFO L225 Difference]: With dead ends: 207 [2022-11-16 11:45:04,411 INFO L226 Difference]: Without dead ends: 191 [2022-11-16 11:45:04,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:45:04,413 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 237 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:04,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 514 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 313 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-11-16 11:45:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-16 11:45:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 176. [2022-11-16 11:45:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 1.1149425287356323) internal successors, (194), 175 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 11:45:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 194 transitions. [2022-11-16 11:45:04,418 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 194 transitions. Word has length 43 [2022-11-16 11:45:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:04,419 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 194 transitions. [2022-11-16 11:45:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 194 transitions. [2022-11-16 11:45:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:45:04,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:04,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:04,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:04,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:45:04,626 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:04,626 INFO L85 PathProgramCache]: Analyzing trace with hash -544147386, now seen corresponding path program 4 times [2022-11-16 11:45:04,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:04,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014224725] [2022-11-16 11:45:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:04,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:45:04,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:04,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014224725] [2022-11-16 11:45:04,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014224725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:04,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504529325] [2022-11-16 11:45:04,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:45:04,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:04,953 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:04,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:45:05,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:45:05,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 11:45:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:05,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:05,275 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-16 11:45:05,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:45:05,889 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-11-16 11:45:05,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-11-16 11:45:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:45:06,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:06,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:45:06,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-11-16 11:45:07,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:45:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:45:07,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504529325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:07,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:07,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 37 [2022-11-16 11:45:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645194879] [2022-11-16 11:45:07,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:07,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:45:07,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:45:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:45:07,433 INFO L87 Difference]: Start difference. First operand 176 states and 194 transitions. Second operand has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 38 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 11:45:08,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:08,791 INFO L93 Difference]: Finished difference Result 183 states and 199 transitions. [2022-11-16 11:45:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:45:08,791 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 38 states have internal predecessors, (108), 0 states have call successors, (0), 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 45 [2022-11-16 11:45:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:08,792 INFO L225 Difference]: With dead ends: 183 [2022-11-16 11:45:08,792 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 11:45:08,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=431, Invalid=3351, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 11:45:08,794 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:08,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 529 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-11-16 11:45:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 11:45:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2022-11-16 11:45:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 84 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 11:45:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-11-16 11:45:08,798 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 45 [2022-11-16 11:45:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:08,798 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-11-16 11:45:08,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 38 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 11:45:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-11-16 11:45:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:45:08,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:08,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:08,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:09,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:09,005 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash 921214137, now seen corresponding path program 4 times [2022-11-16 11:45:09,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:09,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924489450] [2022-11-16 11:45:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:09,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:09,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:09,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924489450] [2022-11-16 11:45:09,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924489450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:09,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438389978] [2022-11-16 11:45:09,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:45:09,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:09,382 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:09,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:45:09,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:45:09,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:09,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:45:09,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:09,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:09,970 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 11:45:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:10,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438389978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:10,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:10,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-11-16 11:45:10,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782629808] [2022-11-16 11:45:10,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:10,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:45:10,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:45:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:45:10,028 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 27 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:10,504 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-11-16 11:45:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:45:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 27 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-16 11:45:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:10,506 INFO L225 Difference]: With dead ends: 109 [2022-11-16 11:45:10,506 INFO L226 Difference]: Without dead ends: 109 [2022-11-16 11:45:10,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:45:10,507 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 182 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:10,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 275 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:45:10,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-16 11:45:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2022-11-16 11:45:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 94 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 11:45:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2022-11-16 11:45:10,511 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 47 [2022-11-16 11:45:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:10,511 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2022-11-16 11:45:10,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 27 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2022-11-16 11:45:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 11:45:10,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:10,513 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:10,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-16 11:45:10,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:10,718 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1256228128, now seen corresponding path program 5 times [2022-11-16 11:45:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334329968] [2022-11-16 11:45:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:13,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334329968] [2022-11-16 11:45:13,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334329968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600482037] [2022-11-16 11:45:13,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:45:13,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:13,655 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:13,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:45:13,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:45:13,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:45:13,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:14,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:14,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:45:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:14,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:14,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:45:14,646 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 16 treesize of output 12 [2022-11-16 11:45:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:14,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600482037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:14,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:14,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16, 16] total 43 [2022-11-16 11:45:14,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147255971] [2022-11-16 11:45:14,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 11:45:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 11:45:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:45:14,900 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:18,338 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2022-11-16 11:45:18,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 11:45:18,339 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-16 11:45:18,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:18,341 INFO L225 Difference]: With dead ends: 157 [2022-11-16 11:45:18,341 INFO L226 Difference]: Without dead ends: 136 [2022-11-16 11:45:18,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=331, Invalid=4499, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 11:45:18,343 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:18,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 500 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 911 Invalid, 0 Unknown, 42 Unchecked, 0.8s Time] [2022-11-16 11:45:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-16 11:45:18,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2022-11-16 11:45:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 11:45:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 135 transitions. [2022-11-16 11:45:18,349 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 135 transitions. Word has length 52 [2022-11-16 11:45:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:18,349 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 135 transitions. [2022-11-16 11:45:18,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 135 transitions. [2022-11-16 11:45:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:45:18,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:18,350 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:18,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:18,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 11:45:18,559 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:18,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1099374717, now seen corresponding path program 6 times [2022-11-16 11:45:18,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560463422] [2022-11-16 11:45:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:18,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:19,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560463422] [2022-11-16 11:45:19,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560463422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015673895] [2022-11-16 11:45:19,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:45:19,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:19,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:19,011 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:19,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:45:19,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 11:45:19,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 11:45:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:19,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:19,859 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 11:45:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:19,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015673895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:19,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:19,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-11-16 11:45:19,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918467591] [2022-11-16 11:45:19,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:19,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:45:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:19,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:45:19,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:45:19,935 INFO L87 Difference]: Start difference. First operand 124 states and 135 transitions. Second operand has 35 states, 34 states have (on average 3.764705882352941) internal successors, (128), 35 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 11:45:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:20,575 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2022-11-16 11:45:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:45:20,576 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.764705882352941) internal successors, (128), 35 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 56 [2022-11-16 11:45:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:20,577 INFO L225 Difference]: With dead ends: 174 [2022-11-16 11:45:20,577 INFO L226 Difference]: Without dead ends: 174 [2022-11-16 11:45:20,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:45:20,579 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 367 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:20,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 351 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:45:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-16 11:45:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2022-11-16 11:45:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1103896103896105) internal successors, (171), 154 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 11:45:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2022-11-16 11:45:20,584 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 56 [2022-11-16 11:45:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:20,584 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2022-11-16 11:45:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.764705882352941) internal successors, (128), 35 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 11:45:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2022-11-16 11:45:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:45:20,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:20,586 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:20,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:20,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:20,791 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:20,791 INFO L85 PathProgramCache]: Analyzing trace with hash 206683100, now seen corresponding path program 7 times [2022-11-16 11:45:20,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:20,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615613153] [2022-11-16 11:45:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:21,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:21,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615613153] [2022-11-16 11:45:21,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615613153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:21,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577375840] [2022-11-16 11:45:21,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:45:21,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:21,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:21,467 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:21,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:45:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:21,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 11:45:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:21,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:22,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:22,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2022-11-16 11:45:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:22,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:22,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-16 11:45:22,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:22,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2022-11-16 11:45:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:23,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577375840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:23,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:23,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 50 [2022-11-16 11:45:23,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391728025] [2022-11-16 11:45:23,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:23,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 11:45:23,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 11:45:23,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:45:23,049 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 50 states, 50 states have (on average 2.72) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 11:45:26,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:26,187 INFO L93 Difference]: Finished difference Result 256 states and 275 transitions. [2022-11-16 11:45:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 11:45:26,188 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 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 61 [2022-11-16 11:45:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:26,189 INFO L225 Difference]: With dead ends: 256 [2022-11-16 11:45:26,189 INFO L226 Difference]: Without dead ends: 185 [2022-11-16 11:45:26,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=948, Invalid=6884, Unknown=0, NotChecked=0, Total=7832 [2022-11-16 11:45:26,191 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 543 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:26,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1112 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1273 Invalid, 0 Unknown, 116 Unchecked, 0.8s Time] [2022-11-16 11:45:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-16 11:45:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2022-11-16 11:45:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.1049382716049383) internal successors, (179), 162 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 11:45:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 179 transitions. [2022-11-16 11:45:26,196 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 179 transitions. Word has length 61 [2022-11-16 11:45:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:26,197 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 179 transitions. [2022-11-16 11:45:26,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 11:45:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 179 transitions. [2022-11-16 11:45:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:45:26,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:26,198 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:26,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:26,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 11:45:26,398 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1628643635, now seen corresponding path program 1 times [2022-11-16 11:45:26,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:26,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425144067] [2022-11-16 11:45:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:26,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 11:45:26,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:26,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425144067] [2022-11-16 11:45:26,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425144067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:26,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666628535] [2022-11-16 11:45:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:26,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:26,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:26,623 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:26,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:45:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:45:26,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:26,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:27,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:45:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 11:45:27,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:27,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:45:27,419 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 16 treesize of output 12 [2022-11-16 11:45:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 11:45:27,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666628535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:27,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:27,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 27 [2022-11-16 11:45:27,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088314956] [2022-11-16 11:45:27,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:27,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:45:27,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:27,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:45:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:45:27,578 INFO L87 Difference]: Start difference. First operand 163 states and 179 transitions. Second operand has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 11:45:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:28,444 INFO L93 Difference]: Finished difference Result 192 states and 208 transitions. [2022-11-16 11:45:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:45:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 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 11:45:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:28,446 INFO L225 Difference]: With dead ends: 192 [2022-11-16 11:45:28,446 INFO L226 Difference]: Without dead ends: 168 [2022-11-16 11:45:28,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:45:28,447 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:28,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 456 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 364 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-11-16 11:45:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-16 11:45:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2022-11-16 11:45:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0864197530864197) internal successors, (176), 162 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 11:45:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 176 transitions. [2022-11-16 11:45:28,452 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 176 transitions. Word has length 64 [2022-11-16 11:45:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:28,453 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 176 transitions. [2022-11-16 11:45:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 11:45:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 176 transitions. [2022-11-16 11:45:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 11:45:28,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:28,454 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:28,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:28,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 11:45:28,660 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1721211167, now seen corresponding path program 8 times [2022-11-16 11:45:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872773283] [2022-11-16 11:45:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:28,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:29,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:29,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872773283] [2022-11-16 11:45:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872773283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:29,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875078903] [2022-11-16 11:45:29,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:45:29,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:29,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:29,335 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:29,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:45:29,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:45:29,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:29,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 11:45:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:29,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:30,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:45:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:30,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875078903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:30,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:30,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-11-16 11:45:30,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009422572] [2022-11-16 11:45:30,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:30,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:45:30,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:30,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:45:30,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:45:30,365 INFO L87 Difference]: Start difference. First operand 163 states and 176 transitions. Second operand has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 11:45:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:31,396 INFO L93 Difference]: Finished difference Result 192 states and 206 transitions. [2022-11-16 11:45:31,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:45:31,396 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 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 65 [2022-11-16 11:45:31,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:31,398 INFO L225 Difference]: With dead ends: 192 [2022-11-16 11:45:31,398 INFO L226 Difference]: Without dead ends: 192 [2022-11-16 11:45:31,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=524, Invalid=2128, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:45:31,399 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 439 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:31,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 473 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:45:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-16 11:45:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2022-11-16 11:45:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0872093023255813) internal successors, (187), 172 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 11:45:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2022-11-16 11:45:31,405 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 65 [2022-11-16 11:45:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:31,405 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2022-11-16 11:45:31,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 11:45:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2022-11-16 11:45:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:45:31,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:31,407 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:31,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:31,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:31,613 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:31,613 INFO L85 PathProgramCache]: Analyzing trace with hash 909516562, now seen corresponding path program 2 times [2022-11-16 11:45:31,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:31,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202827205] [2022-11-16 11:45:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:31,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 13 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:45:32,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:32,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202827205] [2022-11-16 11:45:32,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202827205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:32,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288968831] [2022-11-16 11:45:32,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:45:32,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:32,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:32,580 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:32,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:45:32,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:45:32,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:32,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 11:45:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:32,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:45:32,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:45:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 11:45:32,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 11:45:33,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288968831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:33,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:33,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 13] total 32 [2022-11-16 11:45:33,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139562453] [2022-11-16 11:45:33,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:33,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:45:33,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:45:33,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:45:33,162 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 11:45:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:37,569 INFO L93 Difference]: Finished difference Result 207 states and 218 transitions. [2022-11-16 11:45:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 11:45:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 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 69 [2022-11-16 11:45:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:37,572 INFO L225 Difference]: With dead ends: 207 [2022-11-16 11:45:37,572 INFO L226 Difference]: Without dead ends: 142 [2022-11-16 11:45:37,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1165, Invalid=7207, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 11:45:37,574 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 593 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:37,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 537 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:45:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-16 11:45:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2022-11-16 11:45:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0692307692307692) internal successors, (139), 130 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 11:45:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 139 transitions. [2022-11-16 11:45:37,578 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 139 transitions. Word has length 69 [2022-11-16 11:45:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:37,579 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 139 transitions. [2022-11-16 11:45:37,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 11:45:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 139 transitions. [2022-11-16 11:45:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 11:45:37,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:37,580 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:37,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:37,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:37,785 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:37,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:37,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1799182458, now seen corresponding path program 9 times [2022-11-16 11:45:37,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:37,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588682940] [2022-11-16 11:45:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:37,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:38,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:38,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588682940] [2022-11-16 11:45:38,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588682940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:38,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792293773] [2022-11-16 11:45:38,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:45:38,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:38,571 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:38,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:45:38,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:45:38,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:38,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 11:45:38,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:39,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:45:39,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:45:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:39,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:39,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:45:39,446 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 16 treesize of output 12 [2022-11-16 11:45:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:39,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792293773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:39,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:39,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 41 [2022-11-16 11:45:39,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417126705] [2022-11-16 11:45:39,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:39,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:45:39,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:39,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:45:39,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:45:39,747 INFO L87 Difference]: Start difference. First operand 131 states and 139 transitions. Second operand has 41 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 41 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:41,223 INFO L93 Difference]: Finished difference Result 229 states and 240 transitions. [2022-11-16 11:45:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 11:45:41,224 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 41 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-16 11:45:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:41,225 INFO L225 Difference]: With dead ends: 229 [2022-11-16 11:45:41,225 INFO L226 Difference]: Without dead ends: 152 [2022-11-16 11:45:41,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=495, Invalid=3411, Unknown=0, NotChecked=0, Total=3906 [2022-11-16 11:45:41,226 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 286 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:41,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 761 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:45:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-16 11:45:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2022-11-16 11:45:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.065217391304348) internal successors, (147), 138 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 11:45:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2022-11-16 11:45:41,231 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 70 [2022-11-16 11:45:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:41,231 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2022-11-16 11:45:41,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 41 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2022-11-16 11:45:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 11:45:41,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:41,233 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:41,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:41,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 11:45:41,440 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash 611890839, now seen corresponding path program 10 times [2022-11-16 11:45:41,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:41,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670182013] [2022-11-16 11:45:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:41,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:42,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:42,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670182013] [2022-11-16 11:45:42,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670182013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:42,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007514346] [2022-11-16 11:45:42,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:45:42,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:42,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:42,206 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:42,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 11:45:42,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:45:42,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-16 11:45:42,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:42,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:43,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:45:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:43,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007514346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:43,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:43,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 39 [2022-11-16 11:45:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981956874] [2022-11-16 11:45:43,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:43,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 11:45:43,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 11:45:43,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:45:43,291 INFO L87 Difference]: Start difference. First operand 139 states and 147 transitions. Second operand has 40 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 11:45:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:44,324 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2022-11-16 11:45:44,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:45:44,325 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 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 74 [2022-11-16 11:45:44,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:44,325 INFO L225 Difference]: With dead ends: 167 [2022-11-16 11:45:44,326 INFO L226 Difference]: Without dead ends: 167 [2022-11-16 11:45:44,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=585, Invalid=2385, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:45:44,327 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 431 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:44,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 538 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:45:44,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-16 11:45:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 149. [2022-11-16 11:45:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0675675675675675) internal successors, (158), 148 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 11:45:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 158 transitions. [2022-11-16 11:45:44,339 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 158 transitions. Word has length 74 [2022-11-16 11:45:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:44,341 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 158 transitions. [2022-11-16 11:45:44,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 11:45:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 158 transitions. [2022-11-16 11:45:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 11:45:44,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:44,343 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:44,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:44,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 11:45:44,549 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2068571650, now seen corresponding path program 11 times [2022-11-16 11:45:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:44,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108496879] [2022-11-16 11:45:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:44,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:45,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108496879] [2022-11-16 11:45:45,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108496879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069931999] [2022-11-16 11:45:45,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:45:45,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:45,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:45,456 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:45,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 11:45:45,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-16 11:45:45,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 11:45:45,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:45,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:46,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:45:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:46,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:46,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:45:46,368 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 16 treesize of output 12 [2022-11-16 11:45:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:46,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069931999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:46,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:46,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 41 [2022-11-16 11:45:46,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653510989] [2022-11-16 11:45:46,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:46,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:45:46,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:46,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:45:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:45:46,547 INFO L87 Difference]: Start difference. First operand 149 states and 158 transitions. Second operand has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 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 11:45:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:48,324 INFO L93 Difference]: Finished difference Result 261 states and 274 transitions. [2022-11-16 11:45:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:45:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 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 79 [2022-11-16 11:45:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:48,326 INFO L225 Difference]: With dead ends: 261 [2022-11-16 11:45:48,326 INFO L226 Difference]: Without dead ends: 170 [2022-11-16 11:45:48,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=607, Invalid=4085, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 11:45:48,328 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 436 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:48,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 898 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:45:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-16 11:45:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2022-11-16 11:45:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.064102564102564) internal successors, (166), 156 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 11:45:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 166 transitions. [2022-11-16 11:45:48,332 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 166 transitions. Word has length 79 [2022-11-16 11:45:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:48,333 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 166 transitions. [2022-11-16 11:45:48,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 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 11:45:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 166 transitions. [2022-11-16 11:45:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 11:45:48,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:48,334 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:48,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:48,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:45:48,540 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1739843451, now seen corresponding path program 12 times [2022-11-16 11:45:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:48,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356620234] [2022-11-16 11:45:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:48,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 50 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:49,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356620234] [2022-11-16 11:45:49,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356620234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626485778] [2022-11-16 11:45:49,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:45:49,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:49,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:49,451 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:49,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 11:45:49,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-16 11:45:49,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 11:45:49,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:49,953 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:45:49,953 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:45:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 72 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:50,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 72 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626485778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:51,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:51,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 57 [2022-11-16 11:45:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510982674] [2022-11-16 11:45:51,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 11:45:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 11:45:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=2901, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 11:45:51,529 INFO L87 Difference]: Start difference. First operand 157 states and 166 transitions. Second operand has 58 states, 57 states have (on average 3.912280701754386) internal successors, (223), 58 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 11:45:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:52,838 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2022-11-16 11:45:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:45:52,839 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.912280701754386) internal successors, (223), 58 states have internal predecessors, (223), 0 states have call successors, (0), 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 83 [2022-11-16 11:45:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:52,840 INFO L225 Difference]: With dead ends: 189 [2022-11-16 11:45:52,840 INFO L226 Difference]: Without dead ends: 189 [2022-11-16 11:45:52,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1101, Invalid=4449, Unknown=0, NotChecked=0, Total=5550 [2022-11-16 11:45:52,842 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 422 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:52,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 555 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:45:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-16 11:45:52,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 167. [2022-11-16 11:45:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0662650602409638) internal successors, (177), 166 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 11:45:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 177 transitions. [2022-11-16 11:45:52,847 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 177 transitions. Word has length 83 [2022-11-16 11:45:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:52,848 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 177 transitions. [2022-11-16 11:45:52,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.912280701754386) internal successors, (223), 58 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 11:45:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 177 transitions. [2022-11-16 11:45:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 11:45:52,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:52,850 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:52,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:53,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-16 11:45:53,050 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1886484268, now seen corresponding path program 13 times [2022-11-16 11:45:53,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:53,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532888155] [2022-11-16 11:45:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:53,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:54,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:54,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532888155] [2022-11-16 11:45:54,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532888155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:54,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257169758] [2022-11-16 11:45:54,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:45:54,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:54,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:54,091 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:54,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 11:45:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:54,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 11:45:54,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:54,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:55,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:55,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2022-11-16 11:45:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:55,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:55,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-16 11:45:55,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:55,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2022-11-16 11:45:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 25 proven. 185 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:45:56,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257169758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:56,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:56,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 65 [2022-11-16 11:45:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129585323] [2022-11-16 11:45:56,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:56,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 11:45:56,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 11:45:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=3917, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 11:45:56,351 INFO L87 Difference]: Start difference. First operand 167 states and 177 transitions. Second operand has 65 states, 65 states have (on average 3.1076923076923078) internal successors, (202), 65 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 11:45:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:59,190 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2022-11-16 11:45:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 11:45:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.1076923076923078) internal successors, (202), 65 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) Word has length 88 [2022-11-16 11:45:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:59,193 INFO L225 Difference]: With dead ends: 328 [2022-11-16 11:45:59,193 INFO L226 Difference]: Without dead ends: 287 [2022-11-16 11:45:59,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=850, Invalid=8656, Unknown=0, NotChecked=0, Total=9506 [2022-11-16 11:45:59,195 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 485 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:59,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1577 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1774 Invalid, 0 Unknown, 47 Unchecked, 0.9s Time] [2022-11-16 11:45:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-16 11:45:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2022-11-16 11:45:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0744186046511628) internal successors, (231), 215 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 11:45:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 231 transitions. [2022-11-16 11:45:59,201 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 231 transitions. Word has length 88 [2022-11-16 11:45:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:59,202 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 231 transitions. [2022-11-16 11:45:59,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.1076923076923078) internal successors, (202), 65 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 11:45:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 231 transitions. [2022-11-16 11:45:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 11:45:59,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:59,203 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:59,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:59,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:59,409 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:45:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1815837105, now seen corresponding path program 14 times [2022-11-16 11:45:59,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:59,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184408523] [2022-11-16 11:45:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:59,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 72 proven. 167 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:00,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184408523] [2022-11-16 11:46:00,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184408523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188672309] [2022-11-16 11:46:00,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:46:00,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:00,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:00,218 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:00,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 11:46:00,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:46:00,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 11:46:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:00,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:01,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:46:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:01,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188672309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:01,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:01,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 47 [2022-11-16 11:46:01,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095470543] [2022-11-16 11:46:01,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:01,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 11:46:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 11:46:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 11:46:01,582 INFO L87 Difference]: Start difference. First operand 216 states and 231 transitions. Second operand has 48 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 48 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 11:46:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:02,914 INFO L93 Difference]: Finished difference Result 294 states and 316 transitions. [2022-11-16 11:46:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:46:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 48 states have internal predecessors, (180), 0 states have call successors, (0), 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 92 [2022-11-16 11:46:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:02,916 INFO L225 Difference]: With dead ends: 294 [2022-11-16 11:46:02,916 INFO L226 Difference]: Without dead ends: 294 [2022-11-16 11:46:02,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 149 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=928, Invalid=3764, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 11:46:02,917 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 339 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:02,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 821 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:46:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-16 11:46:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 267. [2022-11-16 11:46:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.086466165413534) internal successors, (289), 266 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 11:46:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 289 transitions. [2022-11-16 11:46:02,924 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 289 transitions. Word has length 92 [2022-11-16 11:46:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:02,925 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 289 transitions. [2022-11-16 11:46:02,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 48 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 11:46:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 289 transitions. [2022-11-16 11:46:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-16 11:46:02,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:02,926 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:02,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:03,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:03,132 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:46:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1440152792, now seen corresponding path program 15 times [2022-11-16 11:46:03,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:03,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176824576] [2022-11-16 11:46:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:03,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:04,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:04,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176824576] [2022-11-16 11:46:04,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176824576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:04,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946444437] [2022-11-16 11:46:04,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:46:04,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:04,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:04,281 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:04,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 11:46:04,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-16 11:46:04,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:04,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-16 11:46:04,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:04,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:46:05,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:46:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:05,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:05,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:46:05,497 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 16 treesize of output 12 [2022-11-16 11:46:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:05,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946444437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:05,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:05,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 26] total 53 [2022-11-16 11:46:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234169226] [2022-11-16 11:46:05,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:05,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 11:46:05,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 11:46:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:46:05,967 INFO L87 Difference]: Start difference. First operand 267 states and 289 transitions. Second operand has 53 states, 53 states have (on average 3.490566037735849) internal successors, (185), 53 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 11:46:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:08,846 INFO L93 Difference]: Finished difference Result 408 states and 435 transitions. [2022-11-16 11:46:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 11:46:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.490566037735849) internal successors, (185), 53 states have internal predecessors, (185), 0 states have call successors, (0), 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 97 [2022-11-16 11:46:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:08,848 INFO L225 Difference]: With dead ends: 408 [2022-11-16 11:46:08,848 INFO L226 Difference]: Without dead ends: 289 [2022-11-16 11:46:08,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=683, Invalid=6457, Unknown=0, NotChecked=0, Total=7140 [2022-11-16 11:46:08,850 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 704 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:08,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 2475 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:46:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-16 11:46:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 275. [2022-11-16 11:46:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.083941605839416) internal successors, (297), 274 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 11:46:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 297 transitions. [2022-11-16 11:46:08,873 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 297 transitions. Word has length 97 [2022-11-16 11:46:08,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:08,874 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 297 transitions. [2022-11-16 11:46:08,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.490566037735849) internal successors, (185), 53 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 11:46:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 297 transitions. [2022-11-16 11:46:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 11:46:08,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:08,877 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:08,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:09,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-16 11:46:09,084 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:46:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash 208714475, now seen corresponding path program 16 times [2022-11-16 11:46:09,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:09,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500245095] [2022-11-16 11:46:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:09,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 98 proven. 211 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:09,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500245095] [2022-11-16 11:46:09,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500245095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48198377] [2022-11-16 11:46:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:46:09,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:09,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:09,976 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:09,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 11:46:10,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:46:10,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 11:46:10,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:10,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:11,352 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 11:46:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:11,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48198377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:11,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:11,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2022-11-16 11:46:11,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135900849] [2022-11-16 11:46:11,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:11,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 11:46:11,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:11,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 11:46:11,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:46:11,567 INFO L87 Difference]: Start difference. First operand 275 states and 297 transitions. Second operand has 51 states, 50 states have (on average 4.06) internal successors, (203), 51 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 11:46:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:13,144 INFO L93 Difference]: Finished difference Result 316 states and 339 transitions. [2022-11-16 11:46:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 11:46:13,145 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.06) internal successors, (203), 51 states have internal predecessors, (203), 0 states have call successors, (0), 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 101 [2022-11-16 11:46:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:13,146 INFO L225 Difference]: With dead ends: 316 [2022-11-16 11:46:13,146 INFO L226 Difference]: Without dead ends: 316 [2022-11-16 11:46:13,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 166 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1029, Invalid=4227, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 11:46:13,148 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 512 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:13,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 1132 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:46:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-16 11:46:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 285. [2022-11-16 11:46:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0845070422535212) internal successors, (308), 284 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 11:46:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 308 transitions. [2022-11-16 11:46:13,155 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 308 transitions. Word has length 101 [2022-11-16 11:46:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:13,156 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 308 transitions. [2022-11-16 11:46:13,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.06) internal successors, (203), 51 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 11:46:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 308 transitions. [2022-11-16 11:46:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-16 11:46:13,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:13,157 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:13,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:13,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:13,364 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:46:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash 822965806, now seen corresponding path program 17 times [2022-11-16 11:46:13,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:13,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138207438] [2022-11-16 11:46:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:13,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:14,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:14,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138207438] [2022-11-16 11:46:14,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138207438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:14,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513266425] [2022-11-16 11:46:14,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:46:14,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:14,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:14,462 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:14,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 11:46:14,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-16 11:46:14,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-16 11:46:14,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:15,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:46:15,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:46:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:15,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:15,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:46:15,669 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 16 treesize of output 12 [2022-11-16 11:46:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:15,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513266425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:15,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:15,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 50 [2022-11-16 11:46:15,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044446205] [2022-11-16 11:46:15,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:15,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 11:46:15,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 11:46:15,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2301, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:46:15,903 INFO L87 Difference]: Start difference. First operand 285 states and 308 transitions. Second operand has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 11:46:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:18,832 INFO L93 Difference]: Finished difference Result 485 states and 521 transitions. [2022-11-16 11:46:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 11:46:18,833 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 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 106 [2022-11-16 11:46:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:18,835 INFO L225 Difference]: With dead ends: 485 [2022-11-16 11:46:18,835 INFO L226 Difference]: Without dead ends: 434 [2022-11-16 11:46:18,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=705, Invalid=6951, Unknown=0, NotChecked=0, Total=7656 [2022-11-16 11:46:18,837 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 648 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 2568 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:18,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 2568 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2203 Invalid, 0 Unknown, 138 Unchecked, 1.1s Time] [2022-11-16 11:46:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-16 11:46:18,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 344. [2022-11-16 11:46:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.0903790087463556) internal successors, (374), 343 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 11:46:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 374 transitions. [2022-11-16 11:46:18,846 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 374 transitions. Word has length 106 [2022-11-16 11:46:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:18,847 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 374 transitions. [2022-11-16 11:46:18,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 11:46:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 374 transitions. [2022-11-16 11:46:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-16 11:46:18,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:18,849 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:18,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:19,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 11:46:19,056 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:46:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash 41208267, now seen corresponding path program 18 times [2022-11-16 11:46:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:19,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182252496] [2022-11-16 11:46:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 260 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:20,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:20,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182252496] [2022-11-16 11:46:20,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182252496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:20,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924063454] [2022-11-16 11:46:20,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:46:20,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:20,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:20,133 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:20,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 11:46:20,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-16 11:46:20,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:20,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 11:46:20,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 153 proven. 235 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:21,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:22,418 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 11:46:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 153 proven. 235 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:22,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924063454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:22,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:22,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 65 [2022-11-16 11:46:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713712657] [2022-11-16 11:46:22,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:22,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-16 11:46:22,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-16 11:46:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=3745, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 11:46:22,701 INFO L87 Difference]: Start difference. First operand 344 states and 374 transitions. Second operand has 66 states, 65 states have (on average 4.015384615384615) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 11:46:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:24,714 INFO L93 Difference]: Finished difference Result 441 states and 479 transitions. [2022-11-16 11:46:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 11:46:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.015384615384615) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 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 110 [2022-11-16 11:46:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:24,715 INFO L225 Difference]: With dead ends: 441 [2022-11-16 11:46:24,715 INFO L226 Difference]: Without dead ends: 441 [2022-11-16 11:46:24,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 169 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1650, Invalid=6722, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 11:46:24,717 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 515 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:24,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1191 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:46:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-16 11:46:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 405. [2022-11-16 11:46:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.099009900990099) internal successors, (444), 404 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 11:46:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 444 transitions. [2022-11-16 11:46:24,727 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 444 transitions. Word has length 110 [2022-11-16 11:46:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:24,727 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 444 transitions. [2022-11-16 11:46:24,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.015384615384615) internal successors, (261), 66 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 11:46:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 444 transitions. [2022-11-16 11:46:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-16 11:46:24,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:24,730 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:24,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:24,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 11:46:24,937 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:46:24,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:24,937 INFO L85 PathProgramCache]: Analyzing trace with hash -501173817, now seen corresponding path program 3 times [2022-11-16 11:46:24,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:24,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215514116] [2022-11-16 11:46:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:24,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 132 proven. 81 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 11:46:25,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:25,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215514116] [2022-11-16 11:46:25,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215514116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:25,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594874061] [2022-11-16 11:46:25,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:46:25,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:25,821 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:25,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 11:46:26,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 11:46:26,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 11:46:26,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:26,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:46:27,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:46:27,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:27,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:46:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 28 proven. 286 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:46:27,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:27,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:46:27,851 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 16 treesize of output 12 [2022-11-16 11:46:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 28 proven. 286 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:46:28,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594874061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:28,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:28,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 24] total 60 [2022-11-16 11:46:28,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24689411] [2022-11-16 11:46:28,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:28,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 11:46:28,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 11:46:28,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3364, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 11:46:28,343 INFO L87 Difference]: Start difference. First operand 405 states and 444 transitions. Second operand has 60 states, 60 states have (on average 3.716666666666667) internal successors, (223), 60 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 11:46:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:33,365 INFO L93 Difference]: Finished difference Result 473 states and 509 transitions. [2022-11-16 11:46:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-16 11:46:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.716666666666667) internal successors, (223), 60 states have internal predecessors, (223), 0 states have call successors, (0), 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 110 [2022-11-16 11:46:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:33,367 INFO L225 Difference]: With dead ends: 473 [2022-11-16 11:46:33,368 INFO L226 Difference]: Without dead ends: 334 [2022-11-16 11:46:33,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5640 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1027, Invalid=20143, Unknown=0, NotChecked=0, Total=21170 [2022-11-16 11:46:33,370 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 369 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 2047 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:33,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 2295 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2047 Invalid, 0 Unknown, 389 Unchecked, 1.0s Time] [2022-11-16 11:46:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-16 11:46:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 323. [2022-11-16 11:46:33,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.0807453416149069) internal successors, (348), 322 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 11:46:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 348 transitions. [2022-11-16 11:46:33,378 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 348 transitions. Word has length 110 [2022-11-16 11:46:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:33,378 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 348 transitions. [2022-11-16 11:46:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.716666666666667) internal successors, (223), 60 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 11:46:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 348 transitions. [2022-11-16 11:46:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 11:46:33,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:33,380 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:33,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-16 11:46:33,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 11:46:33,587 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:46:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:33,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1080052914, now seen corresponding path program 19 times [2022-11-16 11:46:33,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:33,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904395324] [2022-11-16 11:46:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:33,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:34,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:34,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904395324] [2022-11-16 11:46:34,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904395324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:34,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282380103] [2022-11-16 11:46:34,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:46:34,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:34,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:34,976 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:35,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 11:46:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-16 11:46:35,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:35,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:46:37,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:46:37,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:37,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 11:46:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:37,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:37,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:46:37,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:46:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:39,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282380103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:39,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:39,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 77 [2022-11-16 11:46:39,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193608636] [2022-11-16 11:46:39,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:39,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-16 11:46:39,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:39,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-16 11:46:39,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=5572, Unknown=0, NotChecked=0, Total=5852 [2022-11-16 11:46:39,251 INFO L87 Difference]: Start difference. First operand 323 states and 348 transitions. Second operand has 77 states, 77 states have (on average 3.4285714285714284) internal successors, (264), 77 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:46:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:42,733 INFO L93 Difference]: Finished difference Result 473 states and 504 transitions. [2022-11-16 11:46:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 11:46:42,733 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.4285714285714284) internal successors, (264), 77 states have internal predecessors, (264), 0 states have call successors, (0), 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 115 [2022-11-16 11:46:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:42,735 INFO L225 Difference]: With dead ends: 473 [2022-11-16 11:46:42,735 INFO L226 Difference]: Without dead ends: 417 [2022-11-16 11:46:42,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=705, Invalid=12177, Unknown=0, NotChecked=0, Total=12882 [2022-11-16 11:46:42,737 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 391 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 3658 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1382 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:42,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 3658 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1685 Invalid, 0 Unknown, 1382 Unchecked, 0.8s Time] [2022-11-16 11:46:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-16 11:46:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 387. [2022-11-16 11:46:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0854922279792747) internal successors, (419), 386 states have internal predecessors, (419), 0 states have call successors, (0), 0 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 11:46:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 419 transitions. [2022-11-16 11:46:42,745 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 419 transitions. Word has length 115 [2022-11-16 11:46:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:42,746 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 419 transitions. [2022-11-16 11:46:42,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.4285714285714284) internal successors, (264), 77 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 11:46:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 419 transitions. [2022-11-16 11:46:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-16 11:46:42,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:42,748 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:42,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:42,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 11:46:42,954 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:46:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:42,954 INFO L85 PathProgramCache]: Analyzing trace with hash 852500561, now seen corresponding path program 20 times [2022-11-16 11:46:42,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:42,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592801754] [2022-11-16 11:46:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:42,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 162 proven. 314 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:44,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:44,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592801754] [2022-11-16 11:46:44,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592801754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:44,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134658598] [2022-11-16 11:46:44,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:46:44,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:44,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:44,139 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:44,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 11:46:44,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:46:44,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:44,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-16 11:46:44,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:45,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:45,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:46:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:46,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134658598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:46,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:46,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 59 [2022-11-16 11:46:46,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976619080] [2022-11-16 11:46:46,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:46,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 11:46:46,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 11:46:46,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=3154, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 11:46:46,157 INFO L87 Difference]: Start difference. First operand 387 states and 419 transitions. Second operand has 60 states, 59 states have (on average 3.9661016949152543) internal successors, (234), 60 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 11:46:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:48,479 INFO L93 Difference]: Finished difference Result 489 states and 529 transitions. [2022-11-16 11:46:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 11:46:48,480 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.9661016949152543) internal successors, (234), 60 states have internal predecessors, (234), 0 states have call successors, (0), 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 119 [2022-11-16 11:46:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:48,482 INFO L225 Difference]: With dead ends: 489 [2022-11-16 11:46:48,483 INFO L226 Difference]: Without dead ends: 489 [2022-11-16 11:46:48,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 194 SyntacticMatches, 12 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1510, Invalid=6146, Unknown=0, NotChecked=0, Total=7656 [2022-11-16 11:46:48,484 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 604 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:48,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1641 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:46:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-16 11:46:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 453. [2022-11-16 11:46:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.092920353982301) internal successors, (494), 452 states have internal predecessors, (494), 0 states have call successors, (0), 0 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 11:46:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 494 transitions. [2022-11-16 11:46:48,494 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 494 transitions. Word has length 119 [2022-11-16 11:46:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:48,495 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 494 transitions. [2022-11-16 11:46:48,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.9661016949152543) internal successors, (234), 60 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 11:46:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 494 transitions. [2022-11-16 11:46:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 11:46:48,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:48,497 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:48,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:48,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-16 11:46:48,704 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:46:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 898859144, now seen corresponding path program 21 times [2022-11-16 11:46:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264463465] [2022-11-16 11:46:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:48,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:50,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:50,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264463465] [2022-11-16 11:46:50,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264463465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:50,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167504309] [2022-11-16 11:46:50,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:46:50,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:50,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:50,002 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:50,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 11:46:50,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-16 11:46:50,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:50,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-16 11:46:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:50,491 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:46:50,492 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-16 11:46:51,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-16 11:46:52,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:52,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-11-16 11:46:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 41 proven. 52 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-11-16 11:46:52,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:53,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:46:53,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 11:46:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-11-16 11:46:54,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167504309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:54,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:54,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 14, 14] total 60 [2022-11-16 11:46:54,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157591015] [2022-11-16 11:46:54,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:54,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 11:46:54,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 11:46:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3346, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 11:46:54,408 INFO L87 Difference]: Start difference. First operand 453 states and 494 transitions. Second operand has 60 states, 60 states have (on average 3.1666666666666665) internal successors, (190), 60 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 11:47:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:00,747 INFO L93 Difference]: Finished difference Result 644 states and 700 transitions. [2022-11-16 11:47:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-16 11:47:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.1666666666666665) internal successors, (190), 60 states have internal predecessors, (190), 0 states have call successors, (0), 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 124 [2022-11-16 11:47:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:00,750 INFO L225 Difference]: With dead ends: 644 [2022-11-16 11:47:00,750 INFO L226 Difference]: Without dead ends: 469 [2022-11-16 11:47:00,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5880 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1286, Invalid=20766, Unknown=0, NotChecked=0, Total=22052 [2022-11-16 11:47:00,752 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 177 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:00,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1245 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1391 Invalid, 0 Unknown, 147 Unchecked, 0.8s Time] [2022-11-16 11:47:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-11-16 11:47:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 431. [2022-11-16 11:47:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.1116279069767443) internal successors, (478), 430 states have internal predecessors, (478), 0 states have call successors, (0), 0 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 11:47:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 478 transitions. [2022-11-16 11:47:00,761 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 478 transitions. Word has length 124 [2022-11-16 11:47:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:00,761 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 478 transitions. [2022-11-16 11:47:00,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.1666666666666665) internal successors, (190), 60 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 11:47:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 478 transitions. [2022-11-16 11:47:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-16 11:47:00,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:00,763 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 9, 9, 9, 9, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:00,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-16 11:47:00,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:00,969 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:47:00,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:00,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1387871196, now seen corresponding path program 4 times [2022-11-16 11:47:00,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:00,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664673205] [2022-11-16 11:47:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:00,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 37 proven. 493 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 11:47:02,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:02,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664673205] [2022-11-16 11:47:02,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664673205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:02,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440295280] [2022-11-16 11:47:02,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:47:02,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:02,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:02,523 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:02,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 11:47:02,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:47:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 11:47:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:03,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:47:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 216 proven. 127 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-11-16 11:47:03,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:03,302 INFO L321 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2022-11-16 11:47:03,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-11-16 11:47:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 216 proven. 127 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-11-16 11:47:03,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440295280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:03,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:03,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 17] total 40 [2022-11-16 11:47:03,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303244991] [2022-11-16 11:47:03,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:03,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 11:47:03,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:03,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 11:47:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1461, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:47:03,372 INFO L87 Difference]: Start difference. First operand 431 states and 478 transitions. Second operand has 40 states, 40 states have (on average 3.925) internal successors, (157), 40 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 11:47:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:08,273 INFO L93 Difference]: Finished difference Result 522 states and 568 transitions. [2022-11-16 11:47:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-16 11:47:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.925) internal successors, (157), 40 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) Word has length 133 [2022-11-16 11:47:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:08,275 INFO L225 Difference]: With dead ends: 522 [2022-11-16 11:47:08,275 INFO L226 Difference]: Without dead ends: 338 [2022-11-16 11:47:08,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2980 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1117, Invalid=11765, Unknown=0, NotChecked=0, Total=12882 [2022-11-16 11:47:08,277 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 429 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:08,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 1543 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2408 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:47:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-16 11:47:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2022-11-16 11:47:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.093093093093093) internal successors, (364), 333 states have internal predecessors, (364), 0 states have call successors, (0), 0 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 11:47:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 364 transitions. [2022-11-16 11:47:08,285 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 364 transitions. Word has length 133 [2022-11-16 11:47:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:08,285 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 364 transitions. [2022-11-16 11:47:08,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.925) internal successors, (157), 40 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 11:47:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 364 transitions. [2022-11-16 11:47:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-16 11:47:08,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:08,287 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 14, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:08,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:08,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:08,493 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:47:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash 254225307, now seen corresponding path program 5 times [2022-11-16 11:47:08,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:08,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883145526] [2022-11-16 11:47:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:08,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 272 proven. 353 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-16 11:47:09,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:09,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883145526] [2022-11-16 11:47:09,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883145526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:09,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802265583] [2022-11-16 11:47:09,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:47:09,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:09,937 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:09,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 11:47:10,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-16 11:47:10,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-16 11:47:10,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:10,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:47:10,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:47:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 272 proven. 208 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-11-16 11:47:10,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 272 proven. 208 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-11-16 11:47:11,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802265583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:11,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:11,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 19] total 43 [2022-11-16 11:47:11,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791823252] [2022-11-16 11:47:11,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:11,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 11:47:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 11:47:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1674, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:47:11,221 INFO L87 Difference]: Start difference. First operand 334 states and 364 transitions. Second operand has 43 states, 43 states have (on average 4.069767441860465) internal successors, (175), 43 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 11:47:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:13,031 INFO L93 Difference]: Finished difference Result 399 states and 430 transitions. [2022-11-16 11:47:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 11:47:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.069767441860465) internal successors, (175), 43 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) Word has length 147 [2022-11-16 11:47:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:13,033 INFO L225 Difference]: With dead ends: 399 [2022-11-16 11:47:13,033 INFO L226 Difference]: Without dead ends: 343 [2022-11-16 11:47:13,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=547, Invalid=4565, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 11:47:13,034 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 217 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:13,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1182 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:47:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-16 11:47:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2022-11-16 11:47:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.0798816568047338) internal successors, (365), 338 states have internal predecessors, (365), 0 states have call successors, (0), 0 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 11:47:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 365 transitions. [2022-11-16 11:47:13,041 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 365 transitions. Word has length 147 [2022-11-16 11:47:13,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:13,041 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 365 transitions. [2022-11-16 11:47:13,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.069767441860465) internal successors, (175), 43 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 11:47:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 365 transitions. [2022-11-16 11:47:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-16 11:47:13,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:13,043 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:13,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-16 11:47:13,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:13,249 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:47:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2121924142, now seen corresponding path program 6 times [2022-11-16 11:47:13,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:13,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606017127] [2022-11-16 11:47:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:13,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 270 proven. 471 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-16 11:47:14,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:14,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606017127] [2022-11-16 11:47:14,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606017127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:14,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762257774] [2022-11-16 11:47:14,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:47:14,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:14,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:14,662 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:14,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 11:47:15,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-16 11:47:15,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:15,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-16 11:47:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:15,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:47:17,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:47:17,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:47:17,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:47:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 46 proven. 705 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-16 11:47:17,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:17,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:47:17,738 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 16 treesize of output 12 [2022-11-16 11:47:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 46 proven. 691 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-16 11:47:18,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762257774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:18,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:18,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 30] total 73 [2022-11-16 11:47:18,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696239792] [2022-11-16 11:47:18,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:18,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 11:47:18,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 11:47:18,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=5047, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 11:47:18,484 INFO L87 Difference]: Start difference. First operand 339 states and 365 transitions. Second operand has 73 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 73 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 11:47:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:22,330 INFO L93 Difference]: Finished difference Result 413 states and 438 transitions. [2022-11-16 11:47:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-16 11:47:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 73 states have internal predecessors, (287), 0 states have call successors, (0), 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 152 [2022-11-16 11:47:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:22,331 INFO L225 Difference]: With dead ends: 413 [2022-11-16 11:47:22,331 INFO L226 Difference]: Without dead ends: 232 [2022-11-16 11:47:22,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 266 SyntacticMatches, 11 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4567 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=654, Invalid=14352, Unknown=0, NotChecked=0, Total=15006 [2022-11-16 11:47:22,332 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 93 mSDsluCounter, 3561 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 3632 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:22,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 3632 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1671 Invalid, 0 Unknown, 664 Unchecked, 0.8s Time] [2022-11-16 11:47:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-16 11:47:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-11-16 11:47:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0649350649350648) internal successors, (246), 231 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 11:47:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 246 transitions. [2022-11-16 11:47:22,336 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 246 transitions. Word has length 152 [2022-11-16 11:47:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:22,337 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 246 transitions. [2022-11-16 11:47:22,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 73 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 11:47:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 246 transitions. [2022-11-16 11:47:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-16 11:47:22,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:22,339 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 11, 11, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:22,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:22,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-16 11:47:22,547 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:47:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:22,547 INFO L85 PathProgramCache]: Analyzing trace with hash 248339899, now seen corresponding path program 7 times [2022-11-16 11:47:22,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:22,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015182833] [2022-11-16 11:47:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:22,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 316 proven. 633 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-16 11:47:24,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015182833] [2022-11-16 11:47:24,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015182833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692787516] [2022-11-16 11:47:24,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:47:24,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:24,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:24,433 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:24,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-16 11:47:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-16 11:47:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:25,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:47:26,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:47:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 52 proven. 864 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-16 11:47:26,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:26,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:47:26,801 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 16 treesize of output 12 [2022-11-16 11:47:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 52 proven. 864 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-16 11:47:27,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692787516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:27,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:27,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 64 [2022-11-16 11:47:27,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257878677] [2022-11-16 11:47:27,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:27,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 11:47:27,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:27,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 11:47:27,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3855, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 11:47:27,046 INFO L87 Difference]: Start difference. First operand 232 states and 246 transitions. Second operand has 64 states, 64 states have (on average 4.0) internal successors, (256), 64 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 11:47:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:39,420 INFO L93 Difference]: Finished difference Result 507 states and 534 transitions. [2022-11-16 11:47:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-11-16 11:47:39,420 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.0) internal successors, (256), 64 states have internal predecessors, (256), 0 states have call successors, (0), 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 166 [2022-11-16 11:47:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:39,421 INFO L225 Difference]: With dead ends: 507 [2022-11-16 11:47:39,421 INFO L226 Difference]: Without dead ends: 187 [2022-11-16 11:47:39,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 9767 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2453, Invalid=33079, Unknown=0, NotChecked=0, Total=35532 [2022-11-16 11:47:39,423 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 731 mSDsluCounter, 3435 mSDsCounter, 0 mSdLazyCounter, 3979 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 3520 SdHoareTripleChecker+Invalid, 4423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:39,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 3520 Invalid, 4423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3979 Invalid, 0 Unknown, 422 Unchecked, 1.8s Time] [2022-11-16 11:47:39,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-16 11:47:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 176. [2022-11-16 11:47:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0514285714285714) internal successors, (184), 175 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 11:47:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 184 transitions. [2022-11-16 11:47:39,426 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 184 transitions. Word has length 166 [2022-11-16 11:47:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:39,427 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 184 transitions. [2022-11-16 11:47:39,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.0) internal successors, (256), 64 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 11:47:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 184 transitions. [2022-11-16 11:47:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-16 11:47:39,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:39,428 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 18, 18, 12, 12, 12, 12, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:39,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:39,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:39,629 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:47:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:39,629 INFO L85 PathProgramCache]: Analyzing trace with hash 100598669, now seen corresponding path program 8 times [2022-11-16 11:47:39,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:39,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759235970] [2022-11-16 11:47:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 200 proven. 818 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-16 11:47:40,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:40,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759235970] [2022-11-16 11:47:40,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759235970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385237842] [2022-11-16 11:47:40,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:47:40,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:40,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:40,995 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:40,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 11:47:41,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:47:41,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-16 11:47:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 231 proven. 787 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-16 11:47:42,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:43,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:47:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 231 proven. 787 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-16 11:47:43,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385237842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:43,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:43,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 63 [2022-11-16 11:47:43,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251322184] [2022-11-16 11:47:43,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:43,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 11:47:43,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:43,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 11:47:43,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3591, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 11:47:43,436 INFO L87 Difference]: Start difference. First operand 176 states and 184 transitions. Second operand has 64 states, 63 states have (on average 4.333333333333333) internal successors, (273), 64 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 11:47:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:45,823 INFO L93 Difference]: Finished difference Result 229 states and 244 transitions. [2022-11-16 11:47:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 11:47:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.333333333333333) internal successors, (273), 64 states have internal predecessors, (273), 0 states have call successors, (0), 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 175 [2022-11-16 11:47:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:45,825 INFO L225 Difference]: With dead ends: 229 [2022-11-16 11:47:45,825 INFO L226 Difference]: Without dead ends: 229 [2022-11-16 11:47:45,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 303 SyntacticMatches, 13 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1644, Invalid=6728, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 11:47:45,826 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 645 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:45,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 1549 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:47:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-16 11:47:45,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 181. [2022-11-16 11:47:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0555555555555556) internal successors, (190), 180 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 11:47:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 190 transitions. [2022-11-16 11:47:45,831 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 190 transitions. Word has length 175 [2022-11-16 11:47:45,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:45,832 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 190 transitions. [2022-11-16 11:47:45,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.333333333333333) internal successors, (273), 64 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 11:47:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 190 transitions. [2022-11-16 11:47:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-16 11:47:45,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:45,833 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 12, 12, 12, 12, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:45,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:46,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-16 11:47:46,040 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:47:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash -241351988, now seen corresponding path program 9 times [2022-11-16 11:47:46,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:46,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746648741] [2022-11-16 11:47:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:46,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 362 proven. 819 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-16 11:47:47,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:47,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746648741] [2022-11-16 11:47:47,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746648741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:47,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702500607] [2022-11-16 11:47:47,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:47:47,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:47,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:47,958 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:47,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-16 11:47:48,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-16 11:47:48,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:48,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 146 conjunts are in the unsatisfiable core [2022-11-16 11:47:48,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:49,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:47:51,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:47:51,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:47:51,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:47:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 58 proven. 1056 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-16 11:47:51,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:51,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:47:51,596 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 16 treesize of output 12 [2022-11-16 11:47:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 58 proven. 1056 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-16 11:47:52,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702500607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:52,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:52,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 34] total 81 [2022-11-16 11:47:52,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049566040] [2022-11-16 11:47:52,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:52,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-16 11:47:52,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:52,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-16 11:47:52,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=6249, Unknown=0, NotChecked=0, Total=6480 [2022-11-16 11:47:52,517 INFO L87 Difference]: Start difference. First operand 181 states and 190 transitions. Second operand has 81 states, 81 states have (on average 4.0) internal successors, (324), 81 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 11:47:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:57,570 INFO L93 Difference]: Finished difference Result 422 states and 444 transitions. [2022-11-16 11:47:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-16 11:47:57,571 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.0) internal successors, (324), 81 states have internal predecessors, (324), 0 states have call successors, (0), 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 180 [2022-11-16 11:47:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:57,571 INFO L225 Difference]: With dead ends: 422 [2022-11-16 11:47:57,572 INFO L226 Difference]: Without dead ends: 193 [2022-11-16 11:47:57,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 332 SyntacticMatches, 16 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=755, Invalid=18985, Unknown=0, NotChecked=0, Total=19740 [2022-11-16 11:47:57,573 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 151 mSDsluCounter, 4891 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 4983 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 632 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:57,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 4983 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2019 Invalid, 0 Unknown, 632 Unchecked, 0.9s Time] [2022-11-16 11:47:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-16 11:47:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2022-11-16 11:47:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.052910052910053) internal successors, (199), 189 states have internal predecessors, (199), 0 states have call successors, (0), 0 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 11:47:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 199 transitions. [2022-11-16 11:47:57,577 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 199 transitions. Word has length 180 [2022-11-16 11:47:57,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:57,577 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 199 transitions. [2022-11-16 11:47:57,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.0) internal successors, (324), 81 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 11:47:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 199 transitions. [2022-11-16 11:47:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-16 11:47:57,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:57,579 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 20, 20, 13, 13, 13, 13, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:57,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:57,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-16 11:47:57,788 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:47:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash -879866108, now seen corresponding path program 10 times [2022-11-16 11:47:57,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:57,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489377257] [2022-11-16 11:47:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:57,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 242 proven. 983 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-16 11:47:59,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489377257] [2022-11-16 11:47:59,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489377257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873602050] [2022-11-16 11:47:59,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:47:59,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:59,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:59,268 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:59,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-16 11:47:59,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:47:59,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 160 conjunts are in the unsatisfiable core [2022-11-16 11:47:59,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:59,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:48:00,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:48:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 320 proven. 732 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-16 11:48:00,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 320 proven. 732 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-16 11:48:01,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873602050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:01,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:01,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 27] total 70 [2022-11-16 11:48:01,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20415127] [2022-11-16 11:48:01,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:01,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 11:48:01,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:01,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 11:48:01,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4588, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 11:48:01,891 INFO L87 Difference]: Start difference. First operand 190 states and 199 transitions. Second operand has 70 states, 70 states have (on average 4.314285714285714) internal successors, (302), 70 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 11:48:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:08,901 INFO L93 Difference]: Finished difference Result 299 states and 317 transitions. [2022-11-16 11:48:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-16 11:48:08,902 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.314285714285714) internal successors, (302), 70 states have internal predecessors, (302), 0 states have call successors, (0), 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 189 [2022-11-16 11:48:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:08,903 INFO L225 Difference]: With dead ends: 299 [2022-11-16 11:48:08,903 INFO L226 Difference]: Without dead ends: 243 [2022-11-16 11:48:08,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1864, Invalid=14392, Unknown=0, NotChecked=0, Total=16256 [2022-11-16 11:48:08,904 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 845 mSDsluCounter, 3527 mSDsCounter, 0 mSdLazyCounter, 5715 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 5755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:08,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 3619 Invalid, 5755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5715 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 11:48:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-16 11:48:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 200. [2022-11-16 11:48:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.050251256281407) internal successors, (209), 199 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 11:48:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 209 transitions. [2022-11-16 11:48:08,908 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 209 transitions. Word has length 189 [2022-11-16 11:48:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:08,908 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 209 transitions. [2022-11-16 11:48:08,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.314285714285714) internal successors, (302), 70 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 11:48:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 209 transitions. [2022-11-16 11:48:08,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-16 11:48:08,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:08,910 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 22, 22, 13, 13, 13, 13, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:08,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:09,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:09,119 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:48:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:09,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1614238928, now seen corresponding path program 11 times [2022-11-16 11:48:09,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:09,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503198816] [2022-11-16 11:48:09,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:09,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 356 proven. 1223 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 11:48:11,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503198816] [2022-11-16 11:48:11,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503198816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:11,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375195731] [2022-11-16 11:48:11,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:48:11,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:11,475 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:11,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-16 11:48:12,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-16 11:48:12,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:12,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 204 conjunts are in the unsatisfiable core [2022-11-16 11:48:12,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:12,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:48:12,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:48:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 356 proven. 913 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-16 11:48:13,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 356 proven. 913 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-16 11:48:14,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375195731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:14,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:14,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 31, 29] total 68 [2022-11-16 11:48:14,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664058899] [2022-11-16 11:48:14,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:14,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-16 11:48:14,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:14,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-16 11:48:14,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4344, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 11:48:14,039 INFO L87 Difference]: Start difference. First operand 200 states and 209 transitions. Second operand has 68 states, 68 states have (on average 4.338235294117647) internal successors, (295), 68 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 11:48:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:18,559 INFO L93 Difference]: Finished difference Result 278 states and 290 transitions. [2022-11-16 11:48:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 11:48:18,560 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.338235294117647) internal successors, (295), 68 states have internal predecessors, (295), 0 states have call successors, (0), 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 11:48:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:18,561 INFO L225 Difference]: With dead ends: 278 [2022-11-16 11:48:18,561 INFO L226 Difference]: Without dead ends: 217 [2022-11-16 11:48:18,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 380 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=983, Invalid=12357, Unknown=0, NotChecked=0, Total=13340 [2022-11-16 11:48:18,562 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 413 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 5025 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 3441 SdHoareTripleChecker+Invalid, 5052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 5025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:18,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 3441 Invalid, 5052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 5025 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 11:48:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-16 11:48:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 205. [2022-11-16 11:48:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0441176470588236) internal successors, (213), 204 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 213 transitions. [2022-11-16 11:48:18,565 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 213 transitions. Word has length 199 [2022-11-16 11:48:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:18,566 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 213 transitions. [2022-11-16 11:48:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.338235294117647) internal successors, (295), 68 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 11:48:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 213 transitions. [2022-11-16 11:48:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-16 11:48:18,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:18,568 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 23, 23, 13, 13, 13, 13, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:18,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:18,775 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:48:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:18,775 INFO L85 PathProgramCache]: Analyzing trace with hash 711934613, now seen corresponding path program 12 times [2022-11-16 11:48:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:18,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741591108] [2022-11-16 11:48:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 284 proven. 1433 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:48:21,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741591108] [2022-11-16 11:48:21,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741591108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253908104] [2022-11-16 11:48:21,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:48:21,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:21,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:21,647 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:21,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-16 11:48:22,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-16 11:48:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:22,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 152 conjunts are in the unsatisfiable core [2022-11-16 11:48:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:23,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:48:24,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:48:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 70 proven. 1395 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-16 11:48:24,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:24,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:48:24,816 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 16 treesize of output 12 [2022-11-16 11:48:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1749 backedges. 70 proven. 1395 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-16 11:48:25,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253908104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:25,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:25,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 36, 36] total 74 [2022-11-16 11:48:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332317294] [2022-11-16 11:48:25,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:25,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 11:48:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:25,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 11:48:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=5197, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 11:48:25,100 INFO L87 Difference]: Start difference. First operand 205 states and 213 transitions. Second operand has 74 states, 74 states have (on average 4.054054054054054) internal successors, (300), 74 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 11:48:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:32,069 INFO L93 Difference]: Finished difference Result 486 states and 506 transitions. [2022-11-16 11:48:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-16 11:48:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 4.054054054054054) internal successors, (300), 74 states have internal predecessors, (300), 0 states have call successors, (0), 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 204 [2022-11-16 11:48:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:32,070 INFO L225 Difference]: With dead ends: 486 [2022-11-16 11:48:32,070 INFO L226 Difference]: Without dead ends: 217 [2022-11-16 11:48:32,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 390 SyntacticMatches, 23 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 8752 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=956, Invalid=24166, Unknown=0, NotChecked=0, Total=25122 [2022-11-16 11:48:32,072 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 227 mSDsluCounter, 4803 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4904 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 603 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:32,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4904 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2218 Invalid, 0 Unknown, 603 Unchecked, 1.0s Time] [2022-11-16 11:48:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-16 11:48:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2022-11-16 11:48:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.0422535211267605) internal successors, (222), 213 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 11:48:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 222 transitions. [2022-11-16 11:48:32,076 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 222 transitions. Word has length 204 [2022-11-16 11:48:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:32,076 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 222 transitions. [2022-11-16 11:48:32,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 4.054054054054054) internal successors, (300), 74 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 11:48:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 222 transitions. [2022-11-16 11:48:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-16 11:48:32,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:32,078 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 24, 24, 14, 14, 14, 14, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:32,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:32,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:32,286 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:48:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash 396375475, now seen corresponding path program 13 times [2022-11-16 11:48:32,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:32,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030288283] [2022-11-16 11:48:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 288 proven. 1319 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-11-16 11:48:33,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:33,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030288283] [2022-11-16 11:48:33,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030288283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:33,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461226223] [2022-11-16 11:48:33,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:48:33,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:33,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:33,923 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:33,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-16 11:48:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:34,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-16 11:48:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 338 proven. 1247 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-11-16 11:48:35,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:36,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:48:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 338 proven. 1247 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-11-16 11:48:36,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461226223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:36,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:36,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 72 [2022-11-16 11:48:36,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394331602] [2022-11-16 11:48:36,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:36,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 11:48:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:36,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 11:48:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=4685, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 11:48:36,962 INFO L87 Difference]: Start difference. First operand 214 states and 222 transitions. Second operand has 73 states, 72 states have (on average 4.388888888888889) internal successors, (316), 73 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 11:48:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:40,204 INFO L93 Difference]: Finished difference Result 257 states and 270 transitions. [2022-11-16 11:48:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:48:40,204 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 4.388888888888889) internal successors, (316), 73 states have internal predecessors, (316), 0 states have call successors, (0), 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 213 [2022-11-16 11:48:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:40,206 INFO L225 Difference]: With dead ends: 257 [2022-11-16 11:48:40,206 INFO L226 Difference]: Without dead ends: 257 [2022-11-16 11:48:40,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 375 SyntacticMatches, 14 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2183, Invalid=8947, Unknown=0, NotChecked=0, Total=11130 [2022-11-16 11:48:40,207 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 657 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:40,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 1925 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2548 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:48:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-16 11:48:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 219. [2022-11-16 11:48:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0458715596330275) internal successors, (228), 218 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 11:48:40,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 228 transitions. [2022-11-16 11:48:40,211 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 228 transitions. Word has length 213 [2022-11-16 11:48:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:40,212 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 228 transitions. [2022-11-16 11:48:40,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 4.388888888888889) internal successors, (316), 73 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 11:48:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 228 transitions. [2022-11-16 11:48:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-16 11:48:40,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:40,214 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 25, 25, 14, 14, 14, 14, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:40,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:40,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-11-16 11:48:40,421 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:48:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1338210406, now seen corresponding path program 14 times [2022-11-16 11:48:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:40,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019395700] [2022-11-16 11:48:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 310 proven. 1707 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:48:43,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:43,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019395700] [2022-11-16 11:48:43,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019395700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:43,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568949431] [2022-11-16 11:48:43,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:48:43,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:43,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:43,433 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:43,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-16 11:48:43,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:48:43,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 238 conjunts are in the unsatisfiable core [2022-11-16 11:48:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:44,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:48:45,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:48:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 310 proven. 1698 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 11:48:45,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 310 proven. 1335 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2022-11-16 11:48:46,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568949431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:46,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:46,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 44, 33] total 92 [2022-11-16 11:48:46,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75390346] [2022-11-16 11:48:46,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:46,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-16 11:48:46,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-16 11:48:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=8070, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 11:48:46,797 INFO L87 Difference]: Start difference. First operand 219 states and 228 transitions. Second operand has 92 states, 92 states have (on average 4.217391304347826) internal successors, (388), 92 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 11:48:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:53,810 INFO L93 Difference]: Finished difference Result 315 states and 328 transitions. [2022-11-16 11:48:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 11:48:53,810 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 4.217391304347826) internal successors, (388), 92 states have internal predecessors, (388), 0 states have call successors, (0), 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 218 [2022-11-16 11:48:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:53,811 INFO L225 Difference]: With dead ends: 315 [2022-11-16 11:48:53,811 INFO L226 Difference]: Without dead ends: 240 [2022-11-16 11:48:53,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1289, Invalid=20467, Unknown=0, NotChecked=0, Total=21756 [2022-11-16 11:48:53,812 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 385 mSDsluCounter, 5308 mSDsCounter, 0 mSdLazyCounter, 7426 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 5405 SdHoareTripleChecker+Invalid, 7461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 7426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:53,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 5405 Invalid, 7461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 7426 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:48:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-16 11:48:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2022-11-16 11:48:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0403587443946187) internal successors, (232), 223 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 11:48:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2022-11-16 11:48:53,815 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 218 [2022-11-16 11:48:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:53,815 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2022-11-16 11:48:53,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 4.217391304347826) internal successors, (388), 92 states have internal predecessors, (388), 0 states have call successors, (0), 0 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 11:48:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2022-11-16 11:48:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-16 11:48:53,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:53,817 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 26, 26, 14, 14, 14, 14, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:53,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:54,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:54,023 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 11:48:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1522436583, now seen corresponding path program 15 times [2022-11-16 11:48:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:54,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745893453] [2022-11-16 11:48:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:54,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 208 proven. 1953 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 11:48:57,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:57,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745893453] [2022-11-16 11:48:57,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745893453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:57,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386392804] [2022-11-16 11:48:57,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:48:57,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:57,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:57,240 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:57,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-16 11:48:58,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-16 11:48:58,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 11:48:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:58,433 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:48:58,433 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-16 11:48:58,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-16 11:49:00,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:49:00,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-11-16 11:49:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 13 proven. 989 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2022-11-16 11:49:00,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:03,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:49:03,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 11:49:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 1002 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2022-11-16 11:49:03,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386392804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:03,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:03,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 10, 10] total 70 [2022-11-16 11:49:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702098636] [2022-11-16 11:49:03,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:03,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 11:49:03,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:03,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 11:49:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4637, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 11:49:03,496 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand has 70 states, 70 states have (on average 4.128571428571429) internal successors, (289), 70 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 11:49:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:17,840 INFO L93 Difference]: Finished difference Result 296 states and 308 transitions. [2022-11-16 11:49:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-16 11:49:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.128571428571429) internal successors, (289), 70 states have internal predecessors, (289), 0 states have call successors, (0), 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 223 [2022-11-16 11:49:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:17,841 INFO L225 Difference]: With dead ends: 296 [2022-11-16 11:49:17,841 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 11:49:17,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 443 SyntacticMatches, 12 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12446 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=2230, Invalid=35990, Unknown=0, NotChecked=0, Total=38220 [2022-11-16 11:49:17,844 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 2640 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2691 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:17,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 2691 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2160 Invalid, 0 Unknown, 223 Unchecked, 1.1s Time] [2022-11-16 11:49:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 11:49:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 11:49:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 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 11:49:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 11:49:17,845 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 223 [2022-11-16 11:49:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:17,846 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 11:49:17,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.128571428571429) internal successors, (289), 70 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 11:49:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 11:49:17,846 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 11:49:17,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2022-11-16 11:49:17,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2022-11-16 11:49:17,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-11-16 11:49:17,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-11-16 11:49:17,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-11-16 11:49:17,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-16 11:49:17,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-11-16 11:49:17,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-11-16 11:49:17,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-11-16 11:49:17,851 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-11-16 11:49:17,851 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2022-11-16 11:49:17,851 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2022-11-16 11:49:17,851 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-16 11:49:17,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:18,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-11-16 11:49:18,057 INFO L444 BasicCegarLoop]: Path program histogram: [21, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:18,059 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 11:49:18,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 11:49:18 BoogieIcfgContainer [2022-11-16 11:49:18,062 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 11:49:18,062 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 11:49:18,062 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 11:49:18,062 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 11:49:18,063 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:44:28" (3/4) ... [2022-11-16 11:49:18,066 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 11:49:18,076 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-11-16 11:49:18,076 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-16 11:49:18,076 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-16 11:49:18,076 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 11:49:18,105 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 11:49:18,105 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 11:49:18,105 INFO L158 Benchmark]: Toolchain (without parser) took 290778.48ms. Allocated memory was 138.4MB in the beginning and 520.1MB in the end (delta: 381.7MB). Free memory was 100.6MB in the beginning and 220.1MB in the end (delta: -119.6MB). Peak memory consumption was 262.8MB. Max. memory is 16.1GB. [2022-11-16 11:49:18,106 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 138.4MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:49:18,106 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.83ms. Allocated memory is still 138.4MB. Free memory was 100.4MB in the beginning and 108.7MB in the end (delta: -8.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:49:18,106 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.67ms. Allocated memory is still 138.4MB. Free memory was 108.7MB in the beginning and 106.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:49:18,106 INFO L158 Benchmark]: Boogie Preprocessor took 54.63ms. Allocated memory is still 138.4MB. Free memory was 106.5MB in the beginning and 105.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:49:18,106 INFO L158 Benchmark]: RCFGBuilder took 387.35ms. Allocated memory is still 138.4MB. Free memory was 105.2MB in the beginning and 91.1MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-16 11:49:18,107 INFO L158 Benchmark]: TraceAbstraction took 289803.94ms. Allocated memory was 138.4MB in the beginning and 520.1MB in the end (delta: 381.7MB). Free memory was 90.5MB in the beginning and 223.4MB in the end (delta: -132.9MB). Peak memory consumption was 250.2MB. Max. memory is 16.1GB. [2022-11-16 11:49:18,107 INFO L158 Benchmark]: Witness Printer took 42.95ms. Allocated memory is still 520.1MB. Free memory was 223.4MB in the beginning and 220.1MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-16 11:49:18,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 138.4MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 413.83ms. Allocated memory is still 138.4MB. Free memory was 100.4MB in the beginning and 108.7MB in the end (delta: -8.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.67ms. Allocated memory is still 138.4MB. Free memory was 108.7MB in the beginning and 106.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.63ms. Allocated memory is still 138.4MB. Free memory was 106.5MB in the beginning and 105.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 387.35ms. Allocated memory is still 138.4MB. Free memory was 105.2MB in the beginning and 91.1MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 289803.94ms. Allocated memory was 138.4MB in the beginning and 520.1MB in the end (delta: 381.7MB). Free memory was 90.5MB in the beginning and 223.4MB in the end (delta: -132.9MB). Peak memory consumption was 250.2MB. Max. memory is 16.1GB. * Witness Printer took 42.95ms. Allocated memory is still 520.1MB. Free memory was 223.4MB in the beginning and 220.1MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 289.7s, OverallIterations: 63, TraceHistogramMax: 28, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.1s, AutomataDifference: 135.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17083 SdHoareTripleChecker+Valid, 36.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17083 mSDsluCounter, 68876 SdHoareTripleChecker+Invalid, 30.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5561 IncrementalHoareTripleChecker+Unchecked, 65876 mSDsCounter, 887 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68365 IncrementalHoareTripleChecker+Invalid, 74813 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 887 mSolverCounterUnsat, 3000 mSDtfsCounter, 68365 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11713 GetRequests, 7730 SyntacticMatches, 205 SemanticMatches, 3778 ConstructedPredicates, 0 IntricatePredicates, 31 DeprecatedPredicates, 102511 ImplicationChecksByTransitivity, 158.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=453occurred in iteration=50, InterpolantAutomatonStates: 2209, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 63 MinimizatonAttempts, 1156 StatesRemovedByMinimization, 58 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 7.7s SatisfiabilityAnalysisTime, 128.8s InterpolantComputationTime, 9103 NumberOfCodeBlocks, 9035 NumberOfCodeBlocksAsserted, 267 NumberOfCheckSat, 13333 ConstructedInterpolants, 959 QuantifiedInterpolants, 121272 SizeOfPredicates, 1192 NumberOfNonLiveVariables, 18258 ConjunctsInSsa, 3802 ConjunctsInUnsatCore, 160 InterpolantComputations, 17 PerfectInterpolantSequences, 21068/64065 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-16 11:49:18,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4da79210-0f58-4f3a-8753-9d13117ea300/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE