./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 12:47:06,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:47:06,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:47:06,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:47:06,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:47:06,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:47:06,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:47:06,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:47:06,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:47:06,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:47:06,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:47:06,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:47:06,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:47:06,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:47:06,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:47:06,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:47:06,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:47:06,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:47:06,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:47:06,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:47:06,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:47:06,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:47:06,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:47:06,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:47:06,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:47:06,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:47:06,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:47:06,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:47:06,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:47:06,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:47:06,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:47:06,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:47:06,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:47:06,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:47:06,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:47:06,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:47:06,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:47:06,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:47:06,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:47:06,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:47:06,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:47:06,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 12:47:06,842 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:47:06,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:47:06,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:47:06,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:47:06,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:47:06,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:47:06,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:47:06,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:47:06,845 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:47:06,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:47:06,845 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:47:06,845 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:47:06,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:47:06,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:47:06,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:47:06,846 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 12:47:06,846 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 12:47:06,847 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 12:47:06,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:47:06,847 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 12:47:06,847 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:47:06,847 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:47:06,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:47:06,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:47:06,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:47:06,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:47:06,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:47:06,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:47:06,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:47:06,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:47:06,849 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:47:06,849 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:47:06,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:47:06,850 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:47:06,850 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2022-12-13 12:47:07,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:47:07,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:47:07,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:47:07,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:47:07,041 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:47:07,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-12-13 12:47:09,613 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:47:09,777 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:47:09,777 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-12-13 12:47:09,781 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/data/f73a3ad7b/22561bcded4e4d498bfe05ee316d361b/FLAGf819d0ec3 [2022-12-13 12:47:10,178 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/data/f73a3ad7b/22561bcded4e4d498bfe05ee316d361b [2022-12-13 12:47:10,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:47:10,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:47:10,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:47:10,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:47:10,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:47:10,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bfc8467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10, skipping insertion in model container [2022-12-13 12:47:10,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:47:10,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:47:10,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:47:10,320 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:47:10,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:47:10,340 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:47:10,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10 WrapperNode [2022-12-13 12:47:10,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:47:10,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:47:10,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:47:10,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:47:10,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,364 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-12-13 12:47:10,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:47:10,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:47:10,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:47:10,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:47:10,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,378 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:47:10,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:47:10,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:47:10,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:47:10,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (1/1) ... [2022-12-13 12:47:10,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:47:10,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:10,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:47:10,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:47:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:47:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:47:10,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:47:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:47:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:47:10,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:47:10,504 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:47:10,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:47:10,645 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:47:10,651 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:47:10,652 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 12:47:10,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:47:10 BoogieIcfgContainer [2022-12-13 12:47:10,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:47:10,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:47:10,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:47:10,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:47:10,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:47:10" (1/3) ... [2022-12-13 12:47:10,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca5c885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:47:10, skipping insertion in model container [2022-12-13 12:47:10,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:47:10" (2/3) ... [2022-12-13 12:47:10,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca5c885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:47:10, skipping insertion in model container [2022-12-13 12:47:10,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:47:10" (3/3) ... [2022-12-13 12:47:10,663 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2022-12-13 12:47:10,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:47:10,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-12-13 12:47:10,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:47:10,733 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@534ff7eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:47:10,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 12:47:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:10,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-13 12:47:10,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:10,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:47:10,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-12-13 12:47:10,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:10,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186588752] [2022-12-13 12:47:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:10,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:10,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:10,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186588752] [2022-12-13 12:47:10,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186588752] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:47:10,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:47:10,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:47:10,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260767206] [2022-12-13 12:47:10,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:47:10,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:47:10,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:47:10,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:47:10,987 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:11,027 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-12-13 12:47:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:47:11,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-13 12:47:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:11,035 INFO L225 Difference]: With dead ends: 59 [2022-12-13 12:47:11,035 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 12:47:11,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:47:11,039 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:11,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:47:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 12:47:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-12-13 12:47:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-12-13 12:47:11,062 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-12-13 12:47:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:11,063 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-12-13 12:47:11,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-12-13 12:47:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 12:47:11,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:11,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:47:11,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:47:11,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:11,065 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-12-13 12:47:11,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:11,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468917421] [2022-12-13 12:47:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:11,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:11,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:11,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468917421] [2022-12-13 12:47:11,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468917421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:47:11,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:47:11,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:47:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344381817] [2022-12-13 12:47:11,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:47:11,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:47:11,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:11,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:47:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:47:11,116 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:11,151 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-12-13 12:47:11,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:47:11,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 12:47:11,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:11,152 INFO L225 Difference]: With dead ends: 58 [2022-12-13 12:47:11,152 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 12:47:11,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:47:11,153 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:11,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:47:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 12:47:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-12-13 12:47:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-12-13 12:47:11,157 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-12-13 12:47:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:11,157 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-12-13 12:47:11,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-12-13 12:47:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 12:47:11,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:11,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:47:11,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 12:47:11,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:11,159 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-12-13 12:47:11,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:11,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731370005] [2022-12-13 12:47:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:11,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:11,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731370005] [2022-12-13 12:47:11,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731370005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:47:11,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:47:11,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:47:11,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037573228] [2022-12-13 12:47:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:47:11,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:47:11,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:11,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:47:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:47:11,249 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:11,283 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-12-13 12:47:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:47:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 12:47:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:11,284 INFO L225 Difference]: With dead ends: 32 [2022-12-13 12:47:11,284 INFO L226 Difference]: Without dead ends: 32 [2022-12-13 12:47:11,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:47:11,286 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 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 [2022-12-13 12:47:11,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:47:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-13 12:47:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-13 12:47:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-12-13 12:47:11,290 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-12-13 12:47:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:11,290 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-12-13 12:47:11,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-12-13 12:47:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 12:47:11,291 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:11,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:47:11,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 12:47:11,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-12-13 12:47:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:11,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776485236] [2022-12-13 12:47:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:11,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:11,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776485236] [2022-12-13 12:47:11,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776485236] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:47:11,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:47:11,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:47:11,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214315555] [2022-12-13 12:47:11,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:47:11,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:47:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:47:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:47:11,414 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:11,473 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-12-13 12:47:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:47:11,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 12:47:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:11,474 INFO L225 Difference]: With dead ends: 55 [2022-12-13 12:47:11,474 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 12:47:11,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:47:11,476 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:11,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:47:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 12:47:11,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-12-13 12:47:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-12-13 12:47:11,481 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-12-13 12:47:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:11,481 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-12-13 12:47:11,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-12-13 12:47:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 12:47:11,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:11,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:11,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 12:47:11,482 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-12-13 12:47:11,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:11,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766045868] [2022-12-13 12:47:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:11,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:11,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766045868] [2022-12-13 12:47:11,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766045868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:47:11,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:47:11,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:47:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806591343] [2022-12-13 12:47:11,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:47:11,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:47:11,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:47:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:47:11,542 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-12-13 12:47:11,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:11,595 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-12-13 12:47:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:47:11,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-12-13 12:47:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:11,596 INFO L225 Difference]: With dead ends: 60 [2022-12-13 12:47:11,597 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 12:47:11,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:47:11,598 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:11,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:47:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 12:47:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-12-13 12:47:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 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) [2022-12-13 12:47:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-12-13 12:47:11,602 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-12-13 12:47:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:11,602 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-12-13 12:47:11,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-12-13 12:47:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-12-13 12:47:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 12:47:11,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:11,603 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:11,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 12:47:11,604 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-12-13 12:47:11,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:11,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301770991] [2022-12-13 12:47:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:11,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:11,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:11,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301770991] [2022-12-13 12:47:11,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301770991] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:11,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315318893] [2022-12-13 12:47:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:11,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:11,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:11,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:11,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:47:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:11,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:47:11,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:11,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:11,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315318893] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:11,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:11,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 12:47:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858285861] [2022-12-13 12:47:11,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:11,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:47:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:11,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:47:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:47:11,777 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2022-12-13 12:47:11,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:11,853 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-12-13 12:47:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:47:11,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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 10 [2022-12-13 12:47:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:11,856 INFO L225 Difference]: With dead ends: 130 [2022-12-13 12:47:11,856 INFO L226 Difference]: Without dead ends: 130 [2022-12-13 12:47:11,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:47:11,857 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 164 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:11,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 145 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:47:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-13 12:47:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-12-13 12:47:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-12-13 12:47:11,863 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2022-12-13 12:47:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:11,864 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-12-13 12:47:11,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2022-12-13 12:47:11,864 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-12-13 12:47:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 12:47:11,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:11,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:11,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:47:12,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:12,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:12,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-12-13 12:47:12,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:12,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483993914] [2022-12-13 12:47:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:12,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:12,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:12,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483993914] [2022-12-13 12:47:12,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483993914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:12,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242122337] [2022-12-13 12:47:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:12,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:12,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:12,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:12,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:47:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 12:47:12,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:12,356 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 12:47:12,357 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 [2022-12-13 12:47:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:12,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:12,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242122337] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:12,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:12,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 12:47:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053362606] [2022-12-13 12:47:12,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:12,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 12:47:12,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 12:47:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:47:12,479 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 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) [2022-12-13 12:47:12,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:12,640 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-12-13 12:47:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 12:47:12,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 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 11 [2022-12-13 12:47:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:12,642 INFO L225 Difference]: With dead ends: 129 [2022-12-13 12:47:12,642 INFO L226 Difference]: Without dead ends: 129 [2022-12-13 12:47:12,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:47:12,643 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 351 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:12,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 99 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:47:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-13 12:47:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2022-12-13 12:47:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) 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) [2022-12-13 12:47:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-12-13 12:47:12,648 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-12-13 12:47:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:12,649 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-12-13 12:47:12,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 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) [2022-12-13 12:47:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-12-13 12:47:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 12:47:12,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:12,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:12,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 12:47:12,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:12,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-12-13 12:47:12,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:12,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733960799] [2022-12-13 12:47:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:12,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:12,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:12,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733960799] [2022-12-13 12:47:12,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733960799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:12,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307750220] [2022-12-13 12:47:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:12,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:12,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:12,942 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:12,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:47:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 12:47:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:13,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:13,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307750220] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:13,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:13,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 12:47:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387926283] [2022-12-13 12:47:13,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 12:47:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 12:47:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:47:13,056 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-12-13 12:47:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:13,167 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-12-13 12:47:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:47:13,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12 [2022-12-13 12:47:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:13,168 INFO L225 Difference]: With dead ends: 88 [2022-12-13 12:47:13,168 INFO L226 Difference]: Without dead ends: 88 [2022-12-13 12:47:13,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:47:13,169 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:13,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 52 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:47:13,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-13 12:47:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2022-12-13 12:47:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 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) [2022-12-13 12:47:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-12-13 12:47:13,174 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2022-12-13 12:47:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:13,174 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-12-13 12:47:13,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-12-13 12:47:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-12-13 12:47:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 12:47:13,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:13,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:13,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:47:13,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 12:47:13,376 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2022-12-13 12:47:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:13,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808837390] [2022-12-13 12:47:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:47:13,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:13,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808837390] [2022-12-13 12:47:13,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808837390] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:47:13,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:47:13,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:47:13,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579678729] [2022-12-13 12:47:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:47:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:47:13,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:47:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:47:13,581 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:13,599 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-12-13 12:47:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:47:13,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 12:47:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:13,600 INFO L225 Difference]: With dead ends: 46 [2022-12-13 12:47:13,600 INFO L226 Difference]: Without dead ends: 46 [2022-12-13 12:47:13,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:47:13,601 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:13,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:47:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-13 12:47:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-13 12:47:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 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) [2022-12-13 12:47:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-12-13 12:47:13,605 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2022-12-13 12:47:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:13,605 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-12-13 12:47:13,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-12-13 12:47:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 12:47:13,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:13,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:13,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 12:47:13,606 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:13,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:13,607 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2022-12-13 12:47:13,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:13,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402117222] [2022-12-13 12:47:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:13,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:13,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402117222] [2022-12-13 12:47:13,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402117222] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:47:13,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:47:13,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:47:13,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095158574] [2022-12-13 12:47:13,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:47:13,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:47:13,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:13,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:47:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:47:13,740 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:13,770 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-12-13 12:47:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:47:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 12:47:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:13,770 INFO L225 Difference]: With dead ends: 76 [2022-12-13 12:47:13,770 INFO L226 Difference]: Without dead ends: 76 [2022-12-13 12:47:13,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:47:13,771 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:13,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:47:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-13 12:47:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-12-13 12:47:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-12-13 12:47:13,777 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2022-12-13 12:47:13,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:13,777 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-12-13 12:47:13,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-12-13 12:47:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 12:47:13,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:13,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:13,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 12:47:13,779 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2022-12-13 12:47:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:13,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528401673] [2022-12-13 12:47:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:13,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:13,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528401673] [2022-12-13 12:47:13,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528401673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:13,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52266311] [2022-12-13 12:47:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:13,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:13,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:13,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:13,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:47:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 12:47:13,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:13,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:14,013 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 [2022-12-13 12:47:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:14,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52266311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:14,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:14,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 12:47:14,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697322330] [2022-12-13 12:47:14,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:14,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 12:47:14,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 12:47:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:47:14,068 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 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) [2022-12-13 12:47:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:14,141 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-12-13 12:47:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:47:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 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 23 [2022-12-13 12:47:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:14,142 INFO L225 Difference]: With dead ends: 80 [2022-12-13 12:47:14,142 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 12:47:14,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:47:14,148 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:14,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 41 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:47:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 12:47:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-12-13 12:47:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 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) [2022-12-13 12:47:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-12-13 12:47:14,152 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2022-12-13 12:47:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:14,152 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-12-13 12:47:14,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 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) [2022-12-13 12:47:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-12-13 12:47:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 12:47:14,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:14,153 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-12-13 12:47:14,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:47:14,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:14,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-12-13 12:47:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:14,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967926666] [2022-12-13 12:47:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967926666] [2022-12-13 12:47:14,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967926666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806574799] [2022-12-13 12:47:14,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:47:14,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:14,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:14,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:14,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:47:14,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:47:14,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:14,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 12:47:14,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:14,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:47:14,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806574799] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:47:14,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:47:14,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-13 12:47:14,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850601938] [2022-12-13 12:47:14,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:47:14,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:47:14,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:47:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:47:14,578 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:14,642 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-12-13 12:47:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:47:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 12:47:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:14,642 INFO L225 Difference]: With dead ends: 86 [2022-12-13 12:47:14,643 INFO L226 Difference]: Without dead ends: 86 [2022-12-13 12:47:14,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:47:14,643 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:14,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 44 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:47:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-13 12:47:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-12-13 12:47:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 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) [2022-12-13 12:47:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-12-13 12:47:14,647 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2022-12-13 12:47:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:14,647 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-12-13 12:47:14,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-12-13 12:47:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 12:47:14,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:14,648 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] [2022-12-13 12:47:14,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:47:14,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:14,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:14,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2022-12-13 12:47:14,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:14,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221164130] [2022-12-13 12:47:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:14,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:14,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:14,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221164130] [2022-12-13 12:47:14,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221164130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:14,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944794058] [2022-12-13 12:47:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:14,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:14,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:14,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:14,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:47:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 12:47:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:15,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:47:15,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944794058] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:15,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:15,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-12-13 12:47:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369496085] [2022-12-13 12:47:15,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:15,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:47:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:47:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:47:15,122 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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) [2022-12-13 12:47:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:15,295 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2022-12-13 12:47:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:47:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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) Word has length 26 [2022-12-13 12:47:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:15,296 INFO L225 Difference]: With dead ends: 152 [2022-12-13 12:47:15,296 INFO L226 Difference]: Without dead ends: 152 [2022-12-13 12:47:15,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-12-13 12:47:15,297 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:15,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 112 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:47:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-13 12:47:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2022-12-13 12:47:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.2109375) internal successors, (155), 132 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2022-12-13 12:47:15,300 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 26 [2022-12-13 12:47:15,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:15,301 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2022-12-13 12:47:15,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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) [2022-12-13 12:47:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2022-12-13 12:47:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 12:47:15,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:15,301 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:15,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:47:15,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 12:47:15,502 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:15,503 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2022-12-13 12:47:15,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:15,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449092184] [2022-12-13 12:47:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:15,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:15,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449092184] [2022-12-13 12:47:15,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449092184] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25768596] [2022-12-13 12:47:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:15,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:15,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:15,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:15,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:47:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:47:15,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:15,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25768596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:15,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:15,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-12-13 12:47:15,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260263566] [2022-12-13 12:47:15,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:15,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:47:15,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:47:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:47:15,835 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2022-12-13 12:47:15,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:15,994 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2022-12-13 12:47:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 12:47:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) Word has length 34 [2022-12-13 12:47:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:15,995 INFO L225 Difference]: With dead ends: 136 [2022-12-13 12:47:15,995 INFO L226 Difference]: Without dead ends: 136 [2022-12-13 12:47:15,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:47:15,996 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:15,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 75 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:47:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-13 12:47:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2022-12-13 12:47:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1875) internal successors, (152), 132 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2022-12-13 12:47:15,998 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 34 [2022-12-13 12:47:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:15,998 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2022-12-13 12:47:15,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2022-12-13 12:47:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2022-12-13 12:47:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 12:47:15,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:15,999 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:16,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:47:16,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 12:47:16,200 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:16,200 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2022-12-13 12:47:16,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:16,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73007398] [2022-12-13 12:47:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:16,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 12:47:16,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:16,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73007398] [2022-12-13 12:47:16,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73007398] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:16,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488279862] [2022-12-13 12:47:16,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:47:16,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:16,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:16,433 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:16,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:47:16,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:47:16,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:16,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 12:47:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:16,513 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 12:47:16,513 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 [2022-12-13 12:47:16,525 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 [2022-12-13 12:47:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 12:47:16,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 12:47:16,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488279862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:16,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:16,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 10 [2022-12-13 12:47:16,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664951782] [2022-12-13 12:47:16,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:16,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 12:47:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 12:47:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:47:16,868 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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) [2022-12-13 12:47:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:16,944 INFO L93 Difference]: Finished difference Result 165 states and 180 transitions. [2022-12-13 12:47:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:47:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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 39 [2022-12-13 12:47:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:16,945 INFO L225 Difference]: With dead ends: 165 [2022-12-13 12:47:16,945 INFO L226 Difference]: Without dead ends: 165 [2022-12-13 12:47:16,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:47:16,946 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:16,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:47:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-13 12:47:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2022-12-13 12:47:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.1688311688311688) internal successors, (180), 158 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) [2022-12-13 12:47:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2022-12-13 12:47:16,951 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 39 [2022-12-13 12:47:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:16,951 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2022-12-13 12:47:16,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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) [2022-12-13 12:47:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2022-12-13 12:47:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 12:47:16,952 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:16,952 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:16,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 12:47:17,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 12:47:17,154 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:17,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:17,156 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2022-12-13 12:47:17,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:17,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738463715] [2022-12-13 12:47:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:17,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:47:17,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738463715] [2022-12-13 12:47:17,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738463715] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076692771] [2022-12-13 12:47:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:17,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:17,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:17,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:17,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:47:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:47:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 12:47:17,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 12:47:17,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076692771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:17,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:17,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2022-12-13 12:47:17,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310883209] [2022-12-13 12:47:17,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:17,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 12:47:17,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 12:47:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-12-13 12:47:17,637 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:17,814 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2022-12-13 12:47:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 12:47:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-13 12:47:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:17,816 INFO L225 Difference]: With dead ends: 159 [2022-12-13 12:47:17,816 INFO L226 Difference]: Without dead ends: 159 [2022-12-13 12:47:17,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-12-13 12:47:17,816 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 160 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:17,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 93 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:47:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-13 12:47:17,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2022-12-13 12:47:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 151 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2022-12-13 12:47:17,819 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 42 [2022-12-13 12:47:17,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:17,819 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2022-12-13 12:47:17,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2022-12-13 12:47:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 12:47:17,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:17,822 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-12-13 12:47:17,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:47:18,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 12:47:18,023 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:18,023 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2022-12-13 12:47:18,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:18,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698206868] [2022-12-13 12:47:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:18,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 12:47:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:18,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698206868] [2022-12-13 12:47:18,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698206868] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:18,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083194107] [2022-12-13 12:47:18,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:47:18,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:18,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:18,228 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:18,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:47:18,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:47:18,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:18,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:47:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 12:47:18,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 12:47:18,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083194107] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:18,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:18,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2022-12-13 12:47:18,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816458841] [2022-12-13 12:47:18,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:18,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 12:47:18,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 12:47:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:47:18,564 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:19,054 INFO L93 Difference]: Finished difference Result 312 states and 328 transitions. [2022-12-13 12:47:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 12:47:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-12-13 12:47:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:19,055 INFO L225 Difference]: With dead ends: 312 [2022-12-13 12:47:19,055 INFO L226 Difference]: Without dead ends: 312 [2022-12-13 12:47:19,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=1381, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 12:47:19,057 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 532 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:19,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 150 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:47:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-13 12:47:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 207. [2022-12-13 12:47:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.113861386138614) internal successors, (225), 206 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 225 transitions. [2022-12-13 12:47:19,062 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 225 transitions. Word has length 64 [2022-12-13 12:47:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:19,062 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 225 transitions. [2022-12-13 12:47:19,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 225 transitions. [2022-12-13 12:47:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-13 12:47:19,064 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:19,064 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-12-13 12:47:19,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 12:47:19,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 12:47:19,265 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2022-12-13 12:47:19,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:19,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208672663] [2022-12-13 12:47:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:19,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 12:47:19,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:19,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208672663] [2022-12-13 12:47:19,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208672663] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:19,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912595323] [2022-12-13 12:47:19,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:47:19,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:19,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:19,439 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:19,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:47:19,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 12:47:19,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:19,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:47:19,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 12:47:19,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 12:47:19,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912595323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:19,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:19,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 12:47:19,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905663972] [2022-12-13 12:47:19,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:19,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:47:19,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:47:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:47:19,662 INFO L87 Difference]: Start difference. First operand 207 states and 225 transitions. Second operand has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:19,978 INFO L93 Difference]: Finished difference Result 492 states and 574 transitions. [2022-12-13 12:47:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:47:19,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-12-13 12:47:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:19,981 INFO L225 Difference]: With dead ends: 492 [2022-12-13 12:47:19,981 INFO L226 Difference]: Without dead ends: 492 [2022-12-13 12:47:19,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-12-13 12:47:19,982 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 456 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:19,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 309 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:47:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-12-13 12:47:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 265. [2022-12-13 12:47:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.1730769230769231) internal successors, (305), 264 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 305 transitions. [2022-12-13 12:47:19,987 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 305 transitions. Word has length 91 [2022-12-13 12:47:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:19,987 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 305 transitions. [2022-12-13 12:47:19,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 305 transitions. [2022-12-13 12:47:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-13 12:47:19,988 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:19,988 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:19,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:47:20,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 12:47:20,189 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:20,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1874012467, now seen corresponding path program 2 times [2022-12-13 12:47:20,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:20,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600063686] [2022-12-13 12:47:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:20,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 256 proven. 77 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 12:47:20,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600063686] [2022-12-13 12:47:20,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600063686] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939788041] [2022-12-13 12:47:20,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:47:20,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:20,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:20,533 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:20,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:47:20,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:47:20,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:20,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 12:47:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:21,113 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_350 Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_16| Int) (v_ArrVal_349 Int) (v_ArrVal_348 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_21| Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21| v_ArrVal_350) |v_ULTIMATE.start_main_~#mask~0#1.base_16| v_ArrVal_349) |v_ULTIMATE.start_main_~#b~0#1.base_21| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_16| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21| v_ArrVal_348) |v_ULTIMATE.start_main_~#mask~0#1.base_16|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21|) 0))) is different from true [2022-12-13 12:47:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-12-13 12:47:21,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:47:21,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939788041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:47:21,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:47:21,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2022-12-13 12:47:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003094418] [2022-12-13 12:47:21,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:47:21,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:47:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:47:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-12-13 12:47:21,117 INFO L87 Difference]: Start difference. First operand 265 states and 305 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-12-13 12:47:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:21,133 INFO L93 Difference]: Finished difference Result 266 states and 305 transitions. [2022-12-13 12:47:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:47:21,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 92 [2022-12-13 12:47:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:21,135 INFO L225 Difference]: With dead ends: 266 [2022-12-13 12:47:21,135 INFO L226 Difference]: Without dead ends: 264 [2022-12-13 12:47:21,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-12-13 12:47:21,135 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:21,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-12-13 12:47:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-13 12:47:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-12-13 12:47:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.1583011583011582) internal successors, (300), 263 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) [2022-12-13 12:47:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 300 transitions. [2022-12-13 12:47:21,141 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 300 transitions. Word has length 92 [2022-12-13 12:47:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:21,141 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 300 transitions. [2022-12-13 12:47:21,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-12-13 12:47:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 300 transitions. [2022-12-13 12:47:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-13 12:47:21,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:21,142 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-12-13 12:47:21,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:47:21,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:21,343 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:21,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2022-12-13 12:47:21,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:21,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362935659] [2022-12-13 12:47:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:21,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 12:47:21,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:21,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362935659] [2022-12-13 12:47:21,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362935659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:21,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406625162] [2022-12-13 12:47:21,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:21,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:21,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:21,601 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:21,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:47:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:47:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:21,699 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 12:47:21,700 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 [2022-12-13 12:47:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 12:47:21,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 12:47:22,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406625162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:22,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:22,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 12:47:22,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261985984] [2022-12-13 12:47:22,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:22,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 12:47:22,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 12:47:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-12-13 12:47:22,280 INFO L87 Difference]: Start difference. First operand 264 states and 300 transitions. Second operand has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:22,733 INFO L93 Difference]: Finished difference Result 481 states and 526 transitions. [2022-12-13 12:47:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 12:47:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-12-13 12:47:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:22,735 INFO L225 Difference]: With dead ends: 481 [2022-12-13 12:47:22,735 INFO L226 Difference]: Without dead ends: 481 [2022-12-13 12:47:22,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-12-13 12:47:22,736 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 458 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:22,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 215 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:47:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-12-13 12:47:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 266. [2022-12-13 12:47:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.1187739463601531) internal successors, (292), 265 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 292 transitions. [2022-12-13 12:47:22,743 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 292 transitions. Word has length 92 [2022-12-13 12:47:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:22,743 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 292 transitions. [2022-12-13 12:47:22,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 292 transitions. [2022-12-13 12:47:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-13 12:47:22,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:22,744 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:22,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 12:47:22,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:22,945 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2035033164, now seen corresponding path program 1 times [2022-12-13 12:47:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:22,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661710629] [2022-12-13 12:47:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:22,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 256 proven. 77 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 12:47:23,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:23,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661710629] [2022-12-13 12:47:23,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661710629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:23,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324901114] [2022-12-13 12:47:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:23,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:23,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:23,167 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:23,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 12:47:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:23,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 12:47:23,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 210 proven. 106 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 12:47:23,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 210 proven. 106 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 12:47:23,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324901114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:23,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:23,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 21 [2022-12-13 12:47:23,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092933222] [2022-12-13 12:47:23,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:23,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:47:23,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:23,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:47:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:47:23,469 INFO L87 Difference]: Start difference. First operand 266 states and 292 transitions. Second operand has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 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) [2022-12-13 12:47:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:23,837 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2022-12-13 12:47:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:47:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 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 93 [2022-12-13 12:47:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:23,838 INFO L225 Difference]: With dead ends: 210 [2022-12-13 12:47:23,838 INFO L226 Difference]: Without dead ends: 210 [2022-12-13 12:47:23,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 12:47:23,839 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:23,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 86 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:47:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-12-13 12:47:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2022-12-13 12:47:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1176470588235294) internal successors, (228), 208 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) [2022-12-13 12:47:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2022-12-13 12:47:23,846 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 93 [2022-12-13 12:47:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:23,847 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2022-12-13 12:47:23,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 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) [2022-12-13 12:47:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2022-12-13 12:47:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-13 12:47:23,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:23,847 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:23,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 12:47:24,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:24,049 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1008958684, now seen corresponding path program 2 times [2022-12-13 12:47:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:24,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243458386] [2022-12-13 12:47:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:24,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 279 proven. 140 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-13 12:47:24,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:24,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243458386] [2022-12-13 12:47:24,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243458386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:24,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748813068] [2022-12-13 12:47:24,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:47:24,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:24,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:24,336 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:24,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 12:47:24,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:47:24,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:24,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 12:47:24,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 12:47:24,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 12:47:24,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748813068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:24,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:24,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2022-12-13 12:47:24,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122184116] [2022-12-13 12:47:24,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:24,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 12:47:24,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 12:47:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-12-13 12:47:24,748 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:25,250 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-12-13 12:47:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:47:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 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) Word has length 103 [2022-12-13 12:47:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:25,252 INFO L225 Difference]: With dead ends: 211 [2022-12-13 12:47:25,252 INFO L226 Difference]: Without dead ends: 211 [2022-12-13 12:47:25,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 192 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=1496, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 12:47:25,254 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:25,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 86 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 12:47:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-13 12:47:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2022-12-13 12:47:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.107843137254902) internal successors, (226), 208 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2022-12-13 12:47:25,259 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 103 [2022-12-13 12:47:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:25,259 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2022-12-13 12:47:25,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2022-12-13 12:47:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-13 12:47:25,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:25,261 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:25,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 12:47:25,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 12:47:25,462 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:25,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1018520203, now seen corresponding path program 3 times [2022-12-13 12:47:25,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:25,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179984018] [2022-12-13 12:47:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:25,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 293 proven. 142 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-13 12:47:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:25,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179984018] [2022-12-13 12:47:25,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179984018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:25,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822378462] [2022-12-13 12:47:25,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:47:25,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:25,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:25,762 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:25,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 12:47:25,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:47:25,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:25,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 12:47:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:47:25,835 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 9 treesize of output 11 [2022-12-13 12:47:25,839 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 [2022-12-13 12:47:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2022-12-13 12:47:26,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2022-12-13 12:47:26,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822378462] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:26,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:26,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 18 [2022-12-13 12:47:26,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507358302] [2022-12-13 12:47:26,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:26,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:47:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:47:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:47:26,297 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 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) [2022-12-13 12:47:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:26,923 INFO L93 Difference]: Finished difference Result 279 states and 300 transitions. [2022-12-13 12:47:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 12:47:26,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 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) Word has length 108 [2022-12-13 12:47:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:26,924 INFO L225 Difference]: With dead ends: 279 [2022-12-13 12:47:26,924 INFO L226 Difference]: Without dead ends: 279 [2022-12-13 12:47:26,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=454, Invalid=1616, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 12:47:26,925 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 358 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:26,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 65 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 12:47:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-12-13 12:47:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2022-12-13 12:47:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.1119402985074627) internal successors, (298), 272 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 298 transitions. [2022-12-13 12:47:26,929 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 298 transitions. Word has length 108 [2022-12-13 12:47:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:26,929 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 298 transitions. [2022-12-13 12:47:26,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 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) [2022-12-13 12:47:26,929 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 298 transitions. [2022-12-13 12:47:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-13 12:47:26,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:26,930 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:47:26,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 12:47:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 12:47:27,130 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1286679423, now seen corresponding path program 1 times [2022-12-13 12:47:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:27,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122836911] [2022-12-13 12:47:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2022-12-13 12:47:27,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:27,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122836911] [2022-12-13 12:47:27,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122836911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:27,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797873477] [2022-12-13 12:47:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:27,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:27,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:27,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:27,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 12:47:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 12:47:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-13 12:47:27,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 17 proven. 481 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-13 12:47:27,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797873477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:27,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:27,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 23 [2022-12-13 12:47:27,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732864841] [2022-12-13 12:47:27,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:27,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 12:47:27,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:27,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 12:47:27,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2022-12-13 12:47:27,974 INFO L87 Difference]: Start difference. First operand 273 states and 298 transitions. Second operand has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:28,610 INFO L93 Difference]: Finished difference Result 551 states and 594 transitions. [2022-12-13 12:47:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:47:28,610 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 states have internal predecessors, (181), 0 states have call successors, (0), 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 121 [2022-12-13 12:47:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:28,614 INFO L225 Difference]: With dead ends: 551 [2022-12-13 12:47:28,614 INFO L226 Difference]: Without dead ends: 551 [2022-12-13 12:47:28,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-12-13 12:47:28,614 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 342 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:28,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 342 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 12:47:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-12-13 12:47:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 531. [2022-12-13 12:47:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 526 states have (on average 1.129277566539924) internal successors, (594), 530 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 594 transitions. [2022-12-13 12:47:28,620 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 594 transitions. Word has length 121 [2022-12-13 12:47:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:28,620 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 594 transitions. [2022-12-13 12:47:28,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 594 transitions. [2022-12-13 12:47:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-13 12:47:28,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:28,621 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-12-13 12:47:28,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 12:47:28,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 12:47:28,822 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:28,822 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2022-12-13 12:47:28,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:28,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520330563] [2022-12-13 12:47:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:28,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 613 proven. 295 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 12:47:29,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:29,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520330563] [2022-12-13 12:47:29,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520330563] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:29,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083181072] [2022-12-13 12:47:29,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:47:29,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:29,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:29,145 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:29,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 12:47:29,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:47:29,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:47:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-13 12:47:29,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-13 12:47:29,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083181072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:29,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:29,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 43 [2022-12-13 12:47:29,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018038728] [2022-12-13 12:47:29,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:29,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 12:47:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:29,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 12:47:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1382, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 12:47:29,835 INFO L87 Difference]: Start difference. First operand 531 states and 594 transitions. Second operand has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:31,018 INFO L93 Difference]: Finished difference Result 472 states and 503 transitions. [2022-12-13 12:47:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 12:47:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 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 121 [2022-12-13 12:47:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:31,020 INFO L225 Difference]: With dead ends: 472 [2022-12-13 12:47:31,020 INFO L226 Difference]: Without dead ends: 472 [2022-12-13 12:47:31,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 218 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2307, Invalid=9035, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 12:47:31,022 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 587 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:31,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 131 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 12:47:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-12-13 12:47:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 466. [2022-12-13 12:47:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 461 states have (on average 1.0911062906724511) internal successors, (503), 465 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 503 transitions. [2022-12-13 12:47:31,026 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 503 transitions. Word has length 121 [2022-12-13 12:47:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:31,027 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 503 transitions. [2022-12-13 12:47:31,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 503 transitions. [2022-12-13 12:47:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-13 12:47:31,028 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:31,028 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1] [2022-12-13 12:47:31,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 12:47:31,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:31,229 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1239811749, now seen corresponding path program 3 times [2022-12-13 12:47:31,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:31,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859460139] [2022-12-13 12:47:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:31,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1112 proven. 218 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-12-13 12:47:31,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:31,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859460139] [2022-12-13 12:47:31,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859460139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400709391] [2022-12-13 12:47:31,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:47:31,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:31,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:31,607 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:31,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 12:47:31,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:47:31,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:31,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 12:47:31,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:31,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:47:31,700 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 12:47:31,700 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 12:47:31,709 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 [2022-12-13 12:47:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 13 proven. 552 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2022-12-13 12:47:32,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 565 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2022-12-13 12:47:33,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400709391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:33,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:33,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 30 [2022-12-13 12:47:33,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099069319] [2022-12-13 12:47:33,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:33,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 12:47:33,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 12:47:33,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-12-13 12:47:33,540 INFO L87 Difference]: Start difference. First operand 466 states and 503 transitions. Second operand has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:36,594 INFO L93 Difference]: Finished difference Result 465 states and 492 transitions. [2022-12-13 12:47:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 12:47:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-12-13 12:47:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:36,596 INFO L225 Difference]: With dead ends: 465 [2022-12-13 12:47:36,596 INFO L226 Difference]: Without dead ends: 465 [2022-12-13 12:47:36,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2022-12-13 12:47:36,597 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 222 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:36,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 121 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 12:47:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-12-13 12:47:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2022-12-13 12:47:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.0672451193058567) internal successors, (492), 464 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 492 transitions. [2022-12-13 12:47:36,601 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 492 transitions. Word has length 162 [2022-12-13 12:47:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:36,602 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 492 transitions. [2022-12-13 12:47:36,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 492 transitions. [2022-12-13 12:47:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-12-13 12:47:36,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:36,603 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-12-13 12:47:36,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 12:47:36,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 12:47:36,803 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 5 times [2022-12-13 12:47:36,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:36,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194247287] [2022-12-13 12:47:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:36,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4200 proven. 311 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2022-12-13 12:47:37,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194247287] [2022-12-13 12:47:37,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194247287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:37,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132275512] [2022-12-13 12:47:37,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:47:37,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:37,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:37,356 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:37,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 12:47:37,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 12:47:37,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:37,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:47:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4038 proven. 852 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2022-12-13 12:47:38,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4223 proven. 667 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2022-12-13 12:47:38,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132275512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:38,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:38,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2022-12-13 12:47:38,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466761746] [2022-12-13 12:47:38,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:38,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 12:47:38,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:38,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 12:47:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 12:47:38,397 INFO L87 Difference]: Start difference. First operand 465 states and 492 transitions. Second operand has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:39,619 INFO L93 Difference]: Finished difference Result 465 states and 487 transitions. [2022-12-13 12:47:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 12:47:39,620 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 0 states have call successors, (0), 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 301 [2022-12-13 12:47:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:39,622 INFO L225 Difference]: With dead ends: 465 [2022-12-13 12:47:39,622 INFO L226 Difference]: Without dead ends: 465 [2022-12-13 12:47:39,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 576 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1138, Invalid=4412, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 12:47:39,625 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:39,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 254 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 12:47:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-12-13 12:47:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2022-12-13 12:47:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.0563991323210413) internal successors, (487), 464 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 487 transitions. [2022-12-13 12:47:39,630 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 487 transitions. Word has length 301 [2022-12-13 12:47:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:39,630 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 487 transitions. [2022-12-13 12:47:39,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 487 transitions. [2022-12-13 12:47:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-12-13 12:47:39,631 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:39,631 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-12-13 12:47:39,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 12:47:39,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:39,832 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 6 times [2022-12-13 12:47:39,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:39,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151891346] [2022-12-13 12:47:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:39,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4815 proven. 419 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2022-12-13 12:47:40,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:40,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151891346] [2022-12-13 12:47:40,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151891346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:40,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168814600] [2022-12-13 12:47:40,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:47:40,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:40,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:40,459 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:40,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 12:47:42,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-12-13 12:47:42,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:42,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 12:47:42,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-12-13 12:47:42,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-12-13 12:47:43,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168814600] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:43,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:43,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 43 [2022-12-13 12:47:43,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048328761] [2022-12-13 12:47:43,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:43,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 12:47:43,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:43,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 12:47:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 12:47:43,118 INFO L87 Difference]: Start difference. First operand 465 states and 487 transitions. Second operand has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 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) [2022-12-13 12:47:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:45,037 INFO L93 Difference]: Finished difference Result 571 states and 584 transitions. [2022-12-13 12:47:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 12:47:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 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 316 [2022-12-13 12:47:45,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:45,040 INFO L225 Difference]: With dead ends: 571 [2022-12-13 12:47:45,040 INFO L226 Difference]: Without dead ends: 571 [2022-12-13 12:47:45,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 603 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1716, Invalid=7026, Unknown=0, NotChecked=0, Total=8742 [2022-12-13 12:47:45,042 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 146 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 3551 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:45,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 212 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3551 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 12:47:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-12-13 12:47:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 559. [2022-12-13 12:47:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 555 states have (on average 1.0342342342342343) internal successors, (574), 558 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 574 transitions. [2022-12-13 12:47:45,046 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 574 transitions. Word has length 316 [2022-12-13 12:47:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:45,047 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 574 transitions. [2022-12-13 12:47:45,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 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) [2022-12-13 12:47:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 574 transitions. [2022-12-13 12:47:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-12-13 12:47:45,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:45,048 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-12-13 12:47:45,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 12:47:45,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 12:47:45,249 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 7 times [2022-12-13 12:47:45,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:45,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378004837] [2022-12-13 12:47:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:45,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 3828 proven. 705 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2022-12-13 12:47:46,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:46,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378004837] [2022-12-13 12:47:46,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378004837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:46,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681611067] [2022-12-13 12:47:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:47:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:46,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:46,135 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:46,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 12:47:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 12:47:46,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-12-13 12:47:46,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-12-13 12:47:47,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681611067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:47,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:47,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 44 [2022-12-13 12:47:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33126654] [2022-12-13 12:47:47,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:47,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 12:47:47,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 12:47:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 12:47:47,255 INFO L87 Difference]: Start difference. First operand 559 states and 574 transitions. Second operand has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:48,967 INFO L93 Difference]: Finished difference Result 625 states and 633 transitions. [2022-12-13 12:47:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-12-13 12:47:48,967 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 0 states have call successors, (0), 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 331 [2022-12-13 12:47:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:48,968 INFO L225 Difference]: With dead ends: 625 [2022-12-13 12:47:48,968 INFO L226 Difference]: Without dead ends: 625 [2022-12-13 12:47:48,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 627 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6732 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3388, Invalid=16634, Unknown=0, NotChecked=0, Total=20022 [2022-12-13 12:47:48,972 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1028 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:48,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 221 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 12:47:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-12-13 12:47:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 506. [2022-12-13 12:47:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 502 states have (on average 1.0278884462151394) internal successors, (516), 505 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 516 transitions. [2022-12-13 12:47:48,976 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 516 transitions. Word has length 331 [2022-12-13 12:47:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:48,976 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 516 transitions. [2022-12-13 12:47:48,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 516 transitions. [2022-12-13 12:47:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-12-13 12:47:48,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:48,978 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-12-13 12:47:48,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 12:47:49,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 12:47:49,179 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1903304557, now seen corresponding path program 8 times [2022-12-13 12:47:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:49,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946456378] [2022-12-13 12:47:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:49,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-12-13 12:47:49,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:49,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946456378] [2022-12-13 12:47:49,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946456378] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:49,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365819652] [2022-12-13 12:47:49,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:47:49,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:49,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:49,691 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:49,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 12:47:49,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:47:49,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 12:47:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-12-13 12:47:50,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-12-13 12:47:50,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365819652] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:50,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:50,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 12:47:50,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510254871] [2022-12-13 12:47:50,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:50,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 12:47:50,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:50,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 12:47:50,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2022-12-13 12:47:50,298 INFO L87 Difference]: Start difference. First operand 506 states and 516 transitions. Second operand has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:53,852 INFO L93 Difference]: Finished difference Result 1246 states and 1332 transitions. [2022-12-13 12:47:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 12:47:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 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 388 [2022-12-13 12:47:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:53,855 INFO L225 Difference]: With dead ends: 1246 [2022-12-13 12:47:53,855 INFO L226 Difference]: Without dead ends: 1246 [2022-12-13 12:47:53,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 772 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 12:47:53,856 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1707 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:53,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1707 Valid, 819 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 12:47:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-12-13 12:47:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 565. [2022-12-13 12:47:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 561 states have (on average 1.0659536541889483) internal successors, (598), 564 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 598 transitions. [2022-12-13 12:47:53,865 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 598 transitions. Word has length 388 [2022-12-13 12:47:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:53,866 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 598 transitions. [2022-12-13 12:47:53,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 598 transitions. [2022-12-13 12:47:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-12-13 12:47:53,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:53,868 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-12-13 12:47:53,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 12:47:54,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:54,069 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1127100931, now seen corresponding path program 2 times [2022-12-13 12:47:54,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:54,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153448480] [2022-12-13 12:47:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:54,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-12-13 12:47:55,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:55,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153448480] [2022-12-13 12:47:55,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153448480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:55,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705841361] [2022-12-13 12:47:55,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:47:55,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:55,034 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:55,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 12:47:55,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:47:55,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:47:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 12:47:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:47:55,247 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 12:47:55,247 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 [2022-12-13 12:47:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-12-13 12:47:56,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:47:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-12-13 12:47:57,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705841361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:47:57,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:47:57,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-12-13 12:47:57,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025017851] [2022-12-13 12:47:57,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:47:57,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 12:47:57,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:47:57,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 12:47:57,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 12:47:57,021 INFO L87 Difference]: Start difference. First operand 565 states and 598 transitions. Second operand has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 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) [2022-12-13 12:47:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:47:58,379 INFO L93 Difference]: Finished difference Result 1236 states and 1322 transitions. [2022-12-13 12:47:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 12:47:58,379 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 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) Word has length 389 [2022-12-13 12:47:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:47:58,381 INFO L225 Difference]: With dead ends: 1236 [2022-12-13 12:47:58,381 INFO L226 Difference]: Without dead ends: 1236 [2022-12-13 12:47:58,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 755 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1288, Invalid=3268, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 12:47:58,381 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1598 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:47:58,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 767 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 12:47:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-12-13 12:47:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 566. [2022-12-13 12:47:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 562 states have (on average 1.0462633451957295) internal successors, (588), 565 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 588 transitions. [2022-12-13 12:47:58,389 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 588 transitions. Word has length 389 [2022-12-13 12:47:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:47:58,390 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 588 transitions. [2022-12-13 12:47:58,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 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) [2022-12-13 12:47:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 588 transitions. [2022-12-13 12:47:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-12-13 12:47:58,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:47:58,392 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 10, 10, 10, 10, 10, 10, 10, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2022-12-13 12:47:58,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 12:47:58,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 12:47:58,594 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:47:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:47:58,595 INFO L85 PathProgramCache]: Analyzing trace with hash -788499985, now seen corresponding path program 4 times [2022-12-13 12:47:58,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:47:58,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940710127] [2022-12-13 12:47:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:47:58,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:47:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:47:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 6654 proven. 1334 refuted. 0 times theorem prover too weak. 2462 trivial. 0 not checked. [2022-12-13 12:47:59,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:47:59,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940710127] [2022-12-13 12:47:59,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940710127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:47:59,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659360486] [2022-12-13 12:47:59,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:47:59,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:47:59,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:47:59,671 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:47:59,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 12:48:00,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:48:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:48:00,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 12:48:00,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:48:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 9350 proven. 78 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2022-12-13 12:48:00,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:48:01,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-12-13 12:48:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 9350 proven. 78 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2022-12-13 12:48:01,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659360486] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:48:01,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:48:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 52 [2022-12-13 12:48:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848511651] [2022-12-13 12:48:01,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:48:01,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 12:48:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:48:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 12:48:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 12:48:01,582 INFO L87 Difference]: Start difference. First operand 566 states and 588 transitions. Second operand has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:48:05,892 INFO L93 Difference]: Finished difference Result 622 states and 649 transitions. [2022-12-13 12:48:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-13 12:48:05,893 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 0 states have call successors, (0), 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 406 [2022-12-13 12:48:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:48:05,894 INFO L225 Difference]: With dead ends: 622 [2022-12-13 12:48:05,894 INFO L226 Difference]: Without dead ends: 622 [2022-12-13 12:48:05,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 792 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6574 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3084, Invalid=18968, Unknown=0, NotChecked=0, Total=22052 [2022-12-13 12:48:05,895 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2459 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 5048 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 5143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 5048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-13 12:48:05,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2459 Valid, 307 Invalid, 5143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 5048 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-13 12:48:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-12-13 12:48:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 504. [2022-12-13 12:48:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.036) internal successors, (518), 503 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 518 transitions. [2022-12-13 12:48:05,900 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 518 transitions. Word has length 406 [2022-12-13 12:48:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:48:05,901 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 518 transitions. [2022-12-13 12:48:05,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 518 transitions. [2022-12-13 12:48:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-12-13 12:48:05,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:48:05,904 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 64, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-13 12:48:05,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 12:48:06,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 12:48:06,105 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:48:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:48:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash -120695514, now seen corresponding path program 5 times [2022-12-13 12:48:06,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:48:06,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234843258] [2022-12-13 12:48:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:48:06,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:48:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:48:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 4926 proven. 833 refuted. 0 times theorem prover too weak. 5486 trivial. 0 not checked. [2022-12-13 12:48:07,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:48:07,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234843258] [2022-12-13 12:48:07,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234843258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:48:07,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591149708] [2022-12-13 12:48:07,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:48:07,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:48:07,254 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:48:07,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 12:48:12,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-12-13 12:48:12,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:48:12,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 12:48:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:48:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 6585 proven. 3571 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2022-12-13 12:48:13,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:48:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 7345 proven. 2811 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2022-12-13 12:48:13,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591149708] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:48:13,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:48:13,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 62 [2022-12-13 12:48:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163328937] [2022-12-13 12:48:13,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:48:13,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 12:48:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:48:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 12:48:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=3141, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 12:48:13,735 INFO L87 Difference]: Start difference. First operand 504 states and 518 transitions. Second operand has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:48:16,358 INFO L93 Difference]: Finished difference Result 504 states and 517 transitions. [2022-12-13 12:48:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-13 12:48:16,358 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 0 states have call successors, (0), 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 436 [2022-12-13 12:48:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:48:16,361 INFO L225 Difference]: With dead ends: 504 [2022-12-13 12:48:16,361 INFO L226 Difference]: Without dead ends: 504 [2022-12-13 12:48:16,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 830 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3683, Invalid=15499, Unknown=0, NotChecked=0, Total=19182 [2022-12-13 12:48:16,363 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 4077 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 4098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 4077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:48:16,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 313 Invalid, 4098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 4077 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 12:48:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-12-13 12:48:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-12-13 12:48:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.034) internal successors, (517), 503 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 517 transitions. [2022-12-13 12:48:16,369 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 517 transitions. Word has length 436 [2022-12-13 12:48:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:48:16,370 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 517 transitions. [2022-12-13 12:48:16,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 517 transitions. [2022-12-13 12:48:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-12-13 12:48:16,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:48:16,373 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 65, 65, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-13 12:48:16,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 12:48:16,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:16,574 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:48:16,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:48:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1059357911, now seen corresponding path program 6 times [2022-12-13 12:48:16,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:48:16,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105975422] [2022-12-13 12:48:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:48:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:48:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:48:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11575 backedges. 2529 proven. 3474 refuted. 0 times theorem prover too weak. 5572 trivial. 0 not checked. [2022-12-13 12:48:18,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:48:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105975422] [2022-12-13 12:48:18,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105975422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:48:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567824085] [2022-12-13 12:48:18,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:48:18,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:18,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:48:18,566 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:48:18,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 12:48:18,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 12:48:18,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:48:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:48:18,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:48:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:48:18,724 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 9 treesize of output 11 [2022-12-13 12:48:18,726 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 [2022-12-13 12:48:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11575 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 11537 trivial. 0 not checked. [2022-12-13 12:48:19,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:48:19,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567824085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:48:19,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:48:19,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 31 [2022-12-13 12:48:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086001415] [2022-12-13 12:48:19,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:48:19,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:48:19,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:48:19,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:48:19,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-12-13 12:48:19,557 INFO L87 Difference]: Start difference. First operand 504 states and 517 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) [2022-12-13 12:48:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:48:19,581 INFO L93 Difference]: Finished difference Result 503 states and 516 transitions. [2022-12-13 12:48:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:48:19,581 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 441 [2022-12-13 12:48:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:48:19,582 INFO L225 Difference]: With dead ends: 503 [2022-12-13 12:48:19,582 INFO L226 Difference]: Without dead ends: 503 [2022-12-13 12:48:19,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-12-13 12:48:19,583 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:48:19,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 39 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:48:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-12-13 12:48:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 502. [2022-12-13 12:48:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 499 states have (on average 1.032064128256513) internal successors, (515), 501 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 515 transitions. [2022-12-13 12:48:19,586 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 515 transitions. Word has length 441 [2022-12-13 12:48:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:48:19,586 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 515 transitions. [2022-12-13 12:48:19,586 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) [2022-12-13 12:48:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 515 transitions. [2022-12-13 12:48:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-12-13 12:48:19,593 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:48:19,593 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 65, 65, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:48:19,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 12:48:19,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:19,794 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:48:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:48:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1519644578, now seen corresponding path program 2 times [2022-12-13 12:48:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:48:19,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735856628] [2022-12-13 12:48:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:48:19,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:48:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:48:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11565 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11375 trivial. 0 not checked. [2022-12-13 12:48:20,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:48:20,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735856628] [2022-12-13 12:48:20,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735856628] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:48:20,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955078812] [2022-12-13 12:48:20,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:48:20,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:20,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:48:20,503 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:48:20,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 12:48:20,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:48:20,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:48:20,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 12:48:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:48:22,274 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_33| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_28| Int) (v_ArrVal_2261 Int) (v_ArrVal_2263 Int) (v_ArrVal_2262 Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2262) |v_ULTIMATE.start_main_~#mask~0#1.base_28| v_ArrVal_2261) |v_ULTIMATE.start_main_~#b~0#1.base_33| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_28| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2263) |v_ULTIMATE.start_main_~#mask~0#1.base_28|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33|) 0))) is different from true [2022-12-13 12:48:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11565 trivial. 0 not checked. [2022-12-13 12:48:22,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:48:22,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955078812] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:48:22,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:48:22,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-12-13 12:48:22,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216897287] [2022-12-13 12:48:22,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:48:22,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:48:22,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:48:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:48:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2022-12-13 12:48:22,279 INFO L87 Difference]: Start difference. First operand 502 states and 515 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:48:22,287 INFO L93 Difference]: Finished difference Result 501 states and 514 transitions. [2022-12-13 12:48:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:48:22,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 442 [2022-12-13 12:48:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:48:22,290 INFO L225 Difference]: With dead ends: 501 [2022-12-13 12:48:22,291 INFO L226 Difference]: Without dead ends: 457 [2022-12-13 12:48:22,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2022-12-13 12:48:22,291 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:48:22,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-12-13 12:48:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-12-13 12:48:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2022-12-13 12:48:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 450 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 463 transitions. [2022-12-13 12:48:22,298 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 463 transitions. Word has length 442 [2022-12-13 12:48:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:48:22,298 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 463 transitions. [2022-12-13 12:48:22,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 463 transitions. [2022-12-13 12:48:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-12-13 12:48:22,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:48:22,301 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-12-13 12:48:22,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 12:48:22,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 12:48:22,502 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:48:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:48:22,504 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 9 times [2022-12-13 12:48:22,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:48:22,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269941593] [2022-12-13 12:48:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:48:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:48:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:48:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 8596 proven. 1474 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2022-12-13 12:48:23,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:48:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269941593] [2022-12-13 12:48:23,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269941593] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:48:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851170282] [2022-12-13 12:48:23,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:48:23,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:23,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:48:23,947 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:48:23,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 12:48:24,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-13 12:48:24,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:48:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 12:48:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:48:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2384 proven. 6676 refuted. 0 times theorem prover too weak. 6296 trivial. 0 not checked. [2022-12-13 12:48:25,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:48:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 0 proven. 9060 refuted. 0 times theorem prover too weak. 6296 trivial. 0 not checked. [2022-12-13 12:48:26,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851170282] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:48:26,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:48:26,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20, 20] total 76 [2022-12-13 12:48:26,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229362922] [2022-12-13 12:48:26,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:48:26,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-13 12:48:26,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:48:26,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-13 12:48:26,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 12:48:26,572 INFO L87 Difference]: Start difference. First operand 451 states and 463 transitions. Second operand has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:48:46,967 INFO L93 Difference]: Finished difference Result 765 states and 801 transitions. [2022-12-13 12:48:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-12-13 12:48:46,967 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 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 448 [2022-12-13 12:48:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:48:46,969 INFO L225 Difference]: With dead ends: 765 [2022-12-13 12:48:46,969 INFO L226 Difference]: Without dead ends: 765 [2022-12-13 12:48:46,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26070 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=15061, Invalid=48695, Unknown=0, NotChecked=0, Total=63756 [2022-12-13 12:48:46,972 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2021 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2021 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 12:48:46,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2021 Valid, 112 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 12:48:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-12-13 12:48:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 751. [2022-12-13 12:48:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 749 states have (on average 1.0534045393858478) internal successors, (789), 750 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 789 transitions. [2022-12-13 12:48:46,982 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 789 transitions. Word has length 448 [2022-12-13 12:48:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:48:46,982 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 789 transitions. [2022-12-13 12:48:46,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 789 transitions. [2022-12-13 12:48:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-12-13 12:48:46,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:48:46,986 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 87, 87, 87, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2022-12-13 12:48:46,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 12:48:47,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 12:48:47,187 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:48:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:48:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash 566383551, now seen corresponding path program 3 times [2022-12-13 12:48:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:48:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126788342] [2022-12-13 12:48:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:48:47,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:48:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:48:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 10633 proven. 1636 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-12-13 12:48:48,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:48:48,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126788342] [2022-12-13 12:48:48,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126788342] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:48:48,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391609885] [2022-12-13 12:48:48,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:48:48,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:48,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:48:48,978 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:48:48,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 12:48:49,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:48:49,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:48:49,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 12:48:49,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:48:49,150 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 12:48:49,150 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 [2022-12-13 12:48:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 108 proven. 7575 refuted. 0 times theorem prover too weak. 12488 trivial. 0 not checked. [2022-12-13 12:48:50,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:48:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 0 proven. 7683 refuted. 0 times theorem prover too weak. 12488 trivial. 0 not checked. [2022-12-13 12:48:52,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391609885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:48:52,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:48:52,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 6, 6] total 49 [2022-12-13 12:48:52,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517803562] [2022-12-13 12:48:52,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:48:52,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 12:48:52,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:48:52,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 12:48:52,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1940, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 12:48:52,246 INFO L87 Difference]: Start difference. First operand 751 states and 789 transitions. Second operand has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:48:54,372 INFO L93 Difference]: Finished difference Result 776 states and 802 transitions. [2022-12-13 12:48:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 12:48:54,372 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 0 states have call successors, (0), 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 511 [2022-12-13 12:48:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:48:54,374 INFO L225 Difference]: With dead ends: 776 [2022-12-13 12:48:54,374 INFO L226 Difference]: Without dead ends: 776 [2022-12-13 12:48:54,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1013 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2859 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2234, Invalid=7866, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 12:48:54,375 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 767 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 12:48:54,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 66 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 12:48:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-12-13 12:48:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 695. [2022-12-13 12:48:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.037463976945245) internal successors, (720), 694 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 720 transitions. [2022-12-13 12:48:54,379 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 720 transitions. Word has length 511 [2022-12-13 12:48:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:48:54,380 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 720 transitions. [2022-12-13 12:48:54,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 720 transitions. [2022-12-13 12:48:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2022-12-13 12:48:54,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:48:54,383 INFO L195 NwaCegarLoop]: trace histogram [122, 121, 121, 121, 121, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1] [2022-12-13 12:48:54,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 12:48:54,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 12:48:54,584 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:48:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:48:54,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1780829527, now seen corresponding path program 10 times [2022-12-13 12:48:54,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:48:54,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567874350] [2022-12-13 12:48:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:48:54,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:48:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:48:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 21336 proven. 5769 refuted. 0 times theorem prover too weak. 11375 trivial. 0 not checked. [2022-12-13 12:48:59,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:48:59,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567874350] [2022-12-13 12:48:59,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567874350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:48:59,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548384658] [2022-12-13 12:48:59,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:48:59,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:48:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:48:59,042 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:48:59,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 12:49:00,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:49:00,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:49:00,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 2022 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 12:49:00,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:49:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 1298 proven. 34498 refuted. 0 times theorem prover too weak. 2684 trivial. 0 not checked. [2022-12-13 12:49:01,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:49:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 1298 proven. 34498 refuted. 0 times theorem prover too weak. 2684 trivial. 0 not checked. [2022-12-13 12:49:03,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548384658] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:49:03,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:49:03,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 38, 38] total 123 [2022-12-13 12:49:03,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036895018] [2022-12-13 12:49:03,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:49:03,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-13 12:49:03,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:49:03,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-13 12:49:03,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2306, Invalid=12700, Unknown=0, NotChecked=0, Total=15006 [2022-12-13 12:49:03,425 INFO L87 Difference]: Start difference. First operand 695 states and 720 transitions. Second operand has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:49:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:49:14,030 INFO L93 Difference]: Finished difference Result 1668 states and 1758 transitions. [2022-12-13 12:49:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 313 states. [2022-12-13 12:49:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 0 states have call successors, (0), 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 694 [2022-12-13 12:49:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:49:14,033 INFO L225 Difference]: With dead ends: 1668 [2022-12-13 12:49:14,033 INFO L226 Difference]: Without dead ends: 1668 [2022-12-13 12:49:14,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1320 SyntacticMatches, 10 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71608 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=27575, Invalid=146731, Unknown=0, NotChecked=0, Total=174306 [2022-12-13 12:49:14,040 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1264 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 5036 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 5287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:49:14,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 457 Invalid, 5287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5036 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 12:49:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-12-13 12:49:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1640. [2022-12-13 12:49:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.055521659548505) internal successors, (1730), 1639 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:49:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1730 transitions. [2022-12-13 12:49:14,053 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1730 transitions. Word has length 694 [2022-12-13 12:49:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:49:14,054 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 1730 transitions. [2022-12-13 12:49:14,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:49:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1730 transitions. [2022-12-13 12:49:14,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1343 [2022-12-13 12:49:14,068 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:49:14,069 INFO L195 NwaCegarLoop]: trace histogram [239, 238, 238, 238, 238, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-12-13 12:49:14,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 12:49:14,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 12:49:14,269 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:49:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:49:14,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1519464941, now seen corresponding path program 11 times [2022-12-13 12:49:14,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:49:14,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712732314] [2022-12-13 12:49:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:49:14,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:49:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:49:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 86544 proven. 2852 refuted. 0 times theorem prover too weak. 58605 trivial. 0 not checked. [2022-12-13 12:49:18,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:49:18,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712732314] [2022-12-13 12:49:18,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712732314] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:49:18,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490506774] [2022-12-13 12:49:18,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:49:18,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:49:18,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:49:18,774 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:49:18,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 12:49:47,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-12-13 12:49:47,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:49:47,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 12:49:47,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:49:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 91615 proven. 7532 refuted. 0 times theorem prover too weak. 48854 trivial. 0 not checked. [2022-12-13 12:49:48,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:49:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 93272 proven. 5875 refuted. 0 times theorem prover too weak. 48854 trivial. 0 not checked. [2022-12-13 12:49:49,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490506774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:49:49,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:49:49,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 78 [2022-12-13 12:49:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79958215] [2022-12-13 12:49:49,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:49:49,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-13 12:49:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:49:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-13 12:49:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=982, Invalid=5024, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 12:49:49,224 INFO L87 Difference]: Start difference. First operand 1640 states and 1730 transitions. Second operand has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:49:55,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:49:55,438 INFO L93 Difference]: Finished difference Result 1640 states and 1694 transitions. [2022-12-13 12:49:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-12-13 12:49:55,438 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 0 states have call successors, (0), 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 1342 [2022-12-13 12:49:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:49:55,441 INFO L225 Difference]: With dead ends: 1640 [2022-12-13 12:49:55,441 INFO L226 Difference]: Without dead ends: 1640 [2022-12-13 12:49:55,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2834 GetRequests, 2630 SyntacticMatches, 10 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9980 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7187, Invalid=31033, Unknown=0, NotChecked=0, Total=38220 [2022-12-13 12:49:55,443 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 192 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 9068 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 9092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 9068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-13 12:49:55,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 493 Invalid, 9092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 9068 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-13 12:49:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2022-12-13 12:49:55,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1640. [2022-12-13 12:49:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.0335570469798658) internal successors, (1694), 1639 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:49:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1694 transitions. [2022-12-13 12:49:55,452 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1694 transitions. Word has length 1342 [2022-12-13 12:49:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:49:55,453 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 1694 transitions. [2022-12-13 12:49:55,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:49:55,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1694 transitions. [2022-12-13 12:49:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1383 [2022-12-13 12:49:55,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:49:55,462 INFO L195 NwaCegarLoop]: trace histogram [247, 246, 246, 246, 246, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-12-13 12:49:55,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 12:49:55,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 12:49:55,663 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:49:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:49:55,664 INFO L85 PathProgramCache]: Analyzing trace with hash 884344755, now seen corresponding path program 12 times [2022-12-13 12:49:55,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:49:55,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234525941] [2022-12-13 12:49:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:49:55,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:49:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:50:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 92683 proven. 1595 refuted. 0 times theorem prover too weak. 63567 trivial. 0 not checked. [2022-12-13 12:50:00,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:50:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234525941] [2022-12-13 12:50:00,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234525941] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:50:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594574875] [2022-12-13 12:50:00,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:50:00,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:50:00,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:50:00,002 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:50:00,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 12:50:09,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2022-12-13 12:50:09,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:50:09,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2231 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 12:50:09,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:50:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 0 proven. 26770 refuted. 0 times theorem prover too weak. 131075 trivial. 0 not checked. [2022-12-13 12:50:10,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:50:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 25571 proven. 1199 refuted. 0 times theorem prover too weak. 131075 trivial. 0 not checked. [2022-12-13 12:50:11,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594574875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:50:11,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:50:11,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25, 24] total 81 [2022-12-13 12:50:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843635868] [2022-12-13 12:50:11,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:50:11,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-13 12:50:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:50:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-13 12:50:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=5646, Unknown=0, NotChecked=0, Total=6480 [2022-12-13 12:50:11,541 INFO L87 Difference]: Start difference. First operand 1640 states and 1694 transitions. Second operand has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:50:27,329 INFO L93 Difference]: Finished difference Result 1963 states and 2027 transitions. [2022-12-13 12:50:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-12-13 12:50:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 0 states have call successors, (0), 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 1382 [2022-12-13 12:50:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:50:27,334 INFO L225 Difference]: With dead ends: 1963 [2022-12-13 12:50:27,334 INFO L226 Difference]: Without dead ends: 1963 [2022-12-13 12:50:27,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2908 GetRequests, 2718 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8922 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=5164, Invalid=31508, Unknown=0, NotChecked=0, Total=36672 [2022-12-13 12:50:27,337 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2458 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 7773 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2458 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 7806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 7773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:50:27,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2458 Valid, 1077 Invalid, 7806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 7773 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 12:50:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-12-13 12:50:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1690. [2022-12-13 12:50:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0325636471284785) internal successors, (1744), 1689 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1744 transitions. [2022-12-13 12:50:27,353 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1744 transitions. Word has length 1382 [2022-12-13 12:50:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:50:27,354 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1744 transitions. [2022-12-13 12:50:27,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1744 transitions. [2022-12-13 12:50:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1468 [2022-12-13 12:50:27,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:50:27,371 INFO L195 NwaCegarLoop]: trace histogram [264, 263, 263, 263, 263, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-12-13 12:50:27,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 12:50:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 12:50:27,572 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:50:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:50:27,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1199622708, now seen corresponding path program 13 times [2022-12-13 12:50:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:50:27,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062461183] [2022-12-13 12:50:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:50:27,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:50:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:50:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 106853 proven. 1823 refuted. 0 times theorem prover too weak. 71150 trivial. 0 not checked. [2022-12-13 12:50:32,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:50:32,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062461183] [2022-12-13 12:50:32,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062461183] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:50:32,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431666476] [2022-12-13 12:50:32,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:50:32,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:50:32,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:50:32,320 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:50:32,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 12:50:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:50:32,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 4165 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 12:50:32,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:50:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 124640 proven. 9808 refuted. 0 times theorem prover too weak. 45378 trivial. 0 not checked. [2022-12-13 12:50:33,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:50:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 124640 proven. 9808 refuted. 0 times theorem prover too weak. 45378 trivial. 0 not checked. [2022-12-13 12:50:35,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431666476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:50:35,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:50:35,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 81 [2022-12-13 12:50:35,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451040367] [2022-12-13 12:50:35,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:50:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-13 12:50:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:50:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-13 12:50:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=5446, Unknown=0, NotChecked=0, Total=6480 [2022-12-13 12:50:35,076 INFO L87 Difference]: Start difference. First operand 1690 states and 1744 transitions. Second operand has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:50:42,222 INFO L93 Difference]: Finished difference Result 1690 states and 1735 transitions. [2022-12-13 12:50:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-12-13 12:50:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 0 states have call successors, (0), 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 1467 [2022-12-13 12:50:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:50:42,224 INFO L225 Difference]: With dead ends: 1690 [2022-12-13 12:50:42,224 INFO L226 Difference]: Without dead ends: 1690 [2022-12-13 12:50:42,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3119 GetRequests, 2875 SyntacticMatches, 15 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14030 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9152, Invalid=43978, Unknown=0, NotChecked=0, Total=53130 [2022-12-13 12:50:42,227 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 11077 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 11100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-13 12:50:42,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 463 Invalid, 11100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11077 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-13 12:50:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2022-12-13 12:50:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2022-12-13 12:50:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0272350503256364) internal successors, (1735), 1689 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1735 transitions. [2022-12-13 12:50:42,236 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1735 transitions. Word has length 1467 [2022-12-13 12:50:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:50:42,237 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1735 transitions. [2022-12-13 12:50:42,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1735 transitions. [2022-12-13 12:50:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1498 [2022-12-13 12:50:42,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:50:42,247 INFO L195 NwaCegarLoop]: trace histogram [270, 269, 269, 269, 269, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-12-13 12:50:42,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 12:50:42,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 12:50:42,447 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:50:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:50:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash -697448124, now seen corresponding path program 14 times [2022-12-13 12:50:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:50:42,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453734437] [2022-12-13 12:50:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:50:42,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:50:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:50:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 187929 backedges. 112995 proven. 2066 refuted. 0 times theorem prover too weak. 72868 trivial. 0 not checked. [2022-12-13 12:50:47,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:50:47,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453734437] [2022-12-13 12:50:47,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453734437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:50:47,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649988808] [2022-12-13 12:50:47,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:50:47,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:50:47,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:50:47,683 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:50:47,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 12:50:48,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:50:48,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:50:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 4243 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 12:50:48,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:50:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 187929 backedges. 137142 proven. 11806 refuted. 0 times theorem prover too weak. 38981 trivial. 0 not checked. [2022-12-13 12:50:49,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:50:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 187929 backedges. 137142 proven. 11806 refuted. 0 times theorem prover too weak. 38981 trivial. 0 not checked. [2022-12-13 12:50:50,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649988808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:50:50,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:50:50,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 86 [2022-12-13 12:50:50,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519009711] [2022-12-13 12:50:50,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:50:51,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-13 12:50:51,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:50:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-13 12:50:51,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=6152, Unknown=0, NotChecked=0, Total=7310 [2022-12-13 12:50:51,002 INFO L87 Difference]: Start difference. First operand 1690 states and 1735 transitions. Second operand has 86 states, 86 states have (on average 6.232558139534884) internal successors, (536), 86 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:50:59,171 INFO L93 Difference]: Finished difference Result 1690 states and 1727 transitions. [2022-12-13 12:50:59,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-12-13 12:50:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 6.232558139534884) internal successors, (536), 86 states have internal predecessors, (536), 0 states have call successors, (0), 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 1497 [2022-12-13 12:50:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:50:59,174 INFO L225 Difference]: With dead ends: 1690 [2022-12-13 12:50:59,174 INFO L226 Difference]: Without dead ends: 1690 [2022-12-13 12:50:59,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3199 GetRequests, 2931 SyntacticMatches, 16 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17064 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11029, Invalid=53233, Unknown=0, NotChecked=0, Total=64262 [2022-12-13 12:50:59,178 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 204 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 11356 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 11381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 11356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:50:59,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 459 Invalid, 11381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 11356 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-13 12:50:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2022-12-13 12:50:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2022-12-13 12:50:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0224985198342214) internal successors, (1727), 1689 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1727 transitions. [2022-12-13 12:50:59,187 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1727 transitions. Word has length 1497 [2022-12-13 12:50:59,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:50:59,188 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1727 transitions. [2022-12-13 12:50:59,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 6.232558139534884) internal successors, (536), 86 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:50:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1727 transitions. [2022-12-13 12:50:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1523 [2022-12-13 12:50:59,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:50:59,205 INFO L195 NwaCegarLoop]: trace histogram [275, 274, 274, 274, 274, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-12-13 12:50:59,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 12:50:59,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:50:59,407 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:50:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:50:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1275194083, now seen corresponding path program 15 times [2022-12-13 12:50:59,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:50:59,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740235313] [2022-12-13 12:50:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:50:59,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:50:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:51:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 194819 backedges. 116495 proven. 2324 refuted. 0 times theorem prover too weak. 76000 trivial. 0 not checked. [2022-12-13 12:51:04,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:51:04,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740235313] [2022-12-13 12:51:04,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740235313] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:51:04,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228660858] [2022-12-13 12:51:04,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:51:04,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:51:04,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:51:04,881 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:51:04,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 12:51:07,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-12-13 12:51:07,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:51:07,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:51:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:51:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 194819 backedges. 25001 proven. 41200 refuted. 0 times theorem prover too weak. 128618 trivial. 0 not checked. [2022-12-13 12:51:09,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:51:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 194819 backedges. 0 proven. 66201 refuted. 0 times theorem prover too weak. 128618 trivial. 0 not checked. [2022-12-13 12:51:12,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228660858] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:51:12,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:51:12,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 31, 31] total 100 [2022-12-13 12:51:12,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797954591] [2022-12-13 12:51:12,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:51:12,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-12-13 12:51:12,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:51:12,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-12-13 12:51:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1733, Invalid=8167, Unknown=0, NotChecked=0, Total=9900 [2022-12-13 12:51:12,669 INFO L87 Difference]: Start difference. First operand 1690 states and 1727 transitions. Second operand has 100 states, 100 states have (on average 4.88) internal successors, (488), 100 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:51:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:51:30,494 INFO L93 Difference]: Finished difference Result 2316 states and 2392 transitions. [2022-12-13 12:51:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2022-12-13 12:51:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 4.88) internal successors, (488), 100 states have internal predecessors, (488), 0 states have call successors, (0), 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 1522 [2022-12-13 12:51:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:51:30,505 INFO L225 Difference]: With dead ends: 2316 [2022-12-13 12:51:30,505 INFO L226 Difference]: Without dead ends: 2316 [2022-12-13 12:51:30,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3326 GetRequests, 2985 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37465 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=19431, Invalid=97875, Unknown=0, NotChecked=0, Total=117306 [2022-12-13 12:51:30,511 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 5066 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5066 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 12:51:30,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5066 Valid, 422 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 3390 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 12:51:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-12-13 12:51:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1984. [2022-12-13 12:51:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 1.02672718103883) internal successors, (2036), 1983 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:51:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2036 transitions. [2022-12-13 12:51:30,529 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2036 transitions. Word has length 1522 [2022-12-13 12:51:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:51:30,529 INFO L495 AbstractCegarLoop]: Abstraction has 1984 states and 2036 transitions. [2022-12-13 12:51:30,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 4.88) internal successors, (488), 100 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:51:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2036 transitions. [2022-12-13 12:51:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1934 [2022-12-13 12:51:30,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:51:30,559 INFO L195 NwaCegarLoop]: trace histogram [353, 352, 352, 352, 352, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1] [2022-12-13 12:51:30,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 12:51:30,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:51:30,759 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:51:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:51:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash -947449120, now seen corresponding path program 16 times [2022-12-13 12:51:30,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:51:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815119025] [2022-12-13 12:51:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:51:30,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:51:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:51:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 320012 backedges. 188458 proven. 2597 refuted. 0 times theorem prover too weak. 128957 trivial. 0 not checked. [2022-12-13 12:51:38,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:51:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815119025] [2022-12-13 12:51:38,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815119025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:51:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526209336] [2022-12-13 12:51:38,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:51:38,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:51:38,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:51:38,978 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:51:38,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 12:51:52,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:51:52,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:51:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 5421 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 12:51:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:51:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 320012 backedges. 241929 proven. 18233 refuted. 0 times theorem prover too weak. 59850 trivial. 0 not checked. [2022-12-13 12:51:54,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:51:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 320012 backedges. 241929 proven. 18233 refuted. 0 times theorem prover too weak. 59850 trivial. 0 not checked. [2022-12-13 12:51:56,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526209336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:51:56,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:51:56,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40, 40] total 98 [2022-12-13 12:51:56,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900168832] [2022-12-13 12:51:56,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:51:56,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-12-13 12:51:56,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:51:56,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-12-13 12:51:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1469, Invalid=8037, Unknown=0, NotChecked=0, Total=9506 [2022-12-13 12:51:56,540 INFO L87 Difference]: Start difference. First operand 1984 states and 2036 transitions. Second operand has 98 states, 98 states have (on average 6.377551020408164) internal successors, (625), 98 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:52:10,757 INFO L93 Difference]: Finished difference Result 1984 states and 2021 transitions. [2022-12-13 12:52:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-12-13 12:52:10,757 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 6.377551020408164) internal successors, (625), 98 states have internal predecessors, (625), 0 states have call successors, (0), 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 1933 [2022-12-13 12:52:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:52:10,760 INFO L225 Difference]: With dead ends: 1984 [2022-12-13 12:52:10,760 INFO L226 Difference]: Without dead ends: 1984 [2022-12-13 12:52:10,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4134 GetRequests, 3793 SyntacticMatches, 18 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28153 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=18436, Invalid=86864, Unknown=0, NotChecked=0, Total=105300 [2022-12-13 12:52:10,764 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 230 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 17997 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 18024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 17997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-13 12:52:10,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 586 Invalid, 18024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 17997 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-13 12:52:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-12-13 12:52:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1984. [2022-12-13 12:52:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 1.0191628845184064) internal successors, (2021), 1983 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2021 transitions. [2022-12-13 12:52:10,776 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2021 transitions. Word has length 1933 [2022-12-13 12:52:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:52:10,776 INFO L495 AbstractCegarLoop]: Abstraction has 1984 states and 2021 transitions. [2022-12-13 12:52:10,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 6.377551020408164) internal successors, (625), 98 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:52:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2021 transitions. [2022-12-13 12:52:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1969 [2022-12-13 12:52:10,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:52:10,792 INFO L195 NwaCegarLoop]: trace histogram [360, 359, 359, 359, 359, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1] [2022-12-13 12:52:10,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 12:52:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 12:52:10,993 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:52:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:52:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1931788847, now seen corresponding path program 17 times [2022-12-13 12:52:10,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:52:10,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306116346] [2022-12-13 12:52:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:52:10,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:52:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:52:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 332619 backedges. 193335 proven. 3188 refuted. 0 times theorem prover too weak. 136096 trivial. 0 not checked. [2022-12-13 12:52:20,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:52:20,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306116346] [2022-12-13 12:52:20,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306116346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:52:20,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900086920] [2022-12-13 12:52:20,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:52:20,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:52:20,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:52:20,269 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:52:20,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540abc4f-d6a9-4e52-9712-e2c63895149d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process