./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro --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 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 --- 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-8393723 [2022-11-18 18:48:53,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:48:53,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:48:53,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:48:53,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:48:53,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:48:53,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:48:53,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:48:53,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:48:53,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:48:53,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:48:53,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:48:53,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:48:53,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:48:53,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:48:53,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:48:53,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:48:53,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:48:53,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:48:53,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:48:53,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:48:53,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:48:53,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:48:53,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:48:54,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:48:54,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:48:54,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:48:54,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:48:54,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:48:54,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:48:54,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:48:54,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:48:54,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:48:54,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:48:54,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:48:54,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:48:54,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:48:54,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:48:54,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:48:54,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:48:54,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:48:54,015 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 18:48:54,058 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:48:54,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:48:54,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:48:54,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:48:54,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:48:54,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:48:54,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:48:54,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:48:54,062 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:48:54,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:48:54,064 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:48:54,064 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:48:54,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:48:54,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:48:54,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:48:54,065 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 18:48:54,065 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 18:48:54,065 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 18:48:54,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:48:54,066 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:48:54,066 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:48:54,067 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:48:54,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:48:54,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:48:54,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:48:54,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:48:54,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:48:54,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:48:54,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:48:54,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:48:54,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 [2022-11-18 18:48:54,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:48:54,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:48:54,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:48:54,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:48:54,432 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:48:54,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2022-11-18 18:48:54,510 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/data/d344d06e4/b6aaea71092f42fb86bf4522a85ea58d/FLAGfc1209e7b [2022-11-18 18:48:55,074 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:48:55,074 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2022-11-18 18:48:55,092 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/data/d344d06e4/b6aaea71092f42fb86bf4522a85ea58d/FLAGfc1209e7b [2022-11-18 18:48:55,362 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/data/d344d06e4/b6aaea71092f42fb86bf4522a85ea58d [2022-11-18 18:48:55,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:48:55,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:48:55,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:48:55,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:48:55,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:48:55,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2650105a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55, skipping insertion in model container [2022-11-18 18:48:55,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:48:55,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:48:55,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:48:55,792 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:48:55,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:48:55,881 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:48:55,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55 WrapperNode [2022-11-18 18:48:55,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:48:55,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:48:55,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:48:55,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:48:55,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,944 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-18 18:48:55,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:48:55,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:48:55,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:48:55,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:48:55,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,987 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:55,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:48:56,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:48:56,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:48:56,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:48:56,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (1/1) ... [2022-11-18 18:48:56,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:48:56,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:56,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:48:56,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:48:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:48:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:48:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:48:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:48:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:48:56,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:48:56,202 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:48:56,204 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:48:56,397 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:48:56,402 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:48:56,403 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:48:56,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:48:56 BoogieIcfgContainer [2022-11-18 18:48:56,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:48:56,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:48:56,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:48:56,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:48:56,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:48:55" (1/3) ... [2022-11-18 18:48:56,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f68770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:48:56, skipping insertion in model container [2022-11-18 18:48:56,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:55" (2/3) ... [2022-11-18 18:48:56,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f68770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:48:56, skipping insertion in model container [2022-11-18 18:48:56,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:48:56" (3/3) ... [2022-11-18 18:48:56,425 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcpy-alloca-2.i [2022-11-18 18:48:56,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:48:56,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-18 18:48:56,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:48:56,538 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9fed0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:48:56,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-18 18:48:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:48:56,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:56,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:48:56,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:56,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2022-11-18 18:48:56,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:56,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428243617] [2022-11-18 18:48:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:56,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:56,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:56,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428243617] [2022-11-18 18:48:56,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428243617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:56,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:56,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:48:56,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688936331] [2022-11-18 18:48:56,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:56,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:48:56,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:56,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:48:56,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:48:56,914 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 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) Second operand has 4 states, 4 states have (on average 1.5) 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) [2022-11-18 18:48:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:56,974 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-11-18 18:48:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:48:56,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 [2022-11-18 18:48:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:56,996 INFO L225 Difference]: With dead ends: 34 [2022-11-18 18:48:56,996 INFO L226 Difference]: Without dead ends: 30 [2022-11-18 18:48:56,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:48:57,002 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:57,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-18 18:48:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-18 18:48:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-18 18:48:57,041 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2022-11-18 18:48:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:57,041 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-18 18:48:57,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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) [2022-11-18 18:48:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-18 18:48:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:48:57,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:57,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:48:57,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:48:57,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2022-11-18 18:48:57,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:57,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998991117] [2022-11-18 18:48:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:57,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:57,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:57,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998991117] [2022-11-18 18:48:57,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998991117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:57,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:57,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:48:57,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294753498] [2022-11-18 18:48:57,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:57,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:48:57,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:48:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:48:57,098 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-18 18:48:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:57,152 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-18 18:48:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:48:57,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-18 18:48:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:57,154 INFO L225 Difference]: With dead ends: 29 [2022-11-18 18:48:57,155 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 18:48:57,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:48:57,157 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:57,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 18:48:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-18 18:48:57,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-18 18:48:57,162 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2022-11-18 18:48:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:57,170 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-18 18:48:57,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-18 18:48:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-18 18:48:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:48:57,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:57,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:57,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:48:57,174 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:57,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2022-11-18 18:48:57,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:57,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015531081] [2022-11-18 18:48:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:57,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:57,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:57,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015531081] [2022-11-18 18:48:57,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015531081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:57,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:57,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:48:57,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385762710] [2022-11-18 18:48:57,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:57,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:48:57,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:57,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:48:57,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:48:57,391 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:57,456 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-18 18:48:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:48:57,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:48:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:57,457 INFO L225 Difference]: With dead ends: 25 [2022-11-18 18:48:57,458 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 18:48:57,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:48:57,460 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:57,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:48:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 18:48:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-18 18:48:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-18 18:48:57,468 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 7 [2022-11-18 18:48:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:57,468 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-18 18:48:57,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-18 18:48:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:48:57,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:57,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:57,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:48:57,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:57,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033016, now seen corresponding path program 1 times [2022-11-18 18:48:57,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:57,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933868320] [2022-11-18 18:48:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:57,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:57,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933868320] [2022-11-18 18:48:57,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933868320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:57,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:57,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:48:57,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374671795] [2022-11-18 18:48:57,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:57,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:48:57,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:57,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:48:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:48:57,757 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-18 18:48:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:57,806 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-11-18 18:48:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:48:57,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-18 18:48:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:57,809 INFO L225 Difference]: With dead ends: 45 [2022-11-18 18:48:57,810 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 18:48:57,810 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 [2022-11-18 18:48:57,816 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:57,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 37 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 18:48:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-11-18 18:48:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.5) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-18 18:48:57,824 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 7 [2022-11-18 18:48:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:57,825 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-18 18:48:57,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-18 18:48:57,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-18 18:48:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:48:57,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:57,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:57,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:48:57,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:57,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2022-11-18 18:48:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:57,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392462832] [2022-11-18 18:48:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:57,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:57,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392462832] [2022-11-18 18:48:57,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392462832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:57,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:57,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:48:57,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952500183] [2022-11-18 18:48:57,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:57,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:48:57,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:57,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:48:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:48:57,927 INFO L87 Difference]: Start difference. First operand 31 states and 36 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) [2022-11-18 18:48:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:57,967 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-11-18 18:48:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:48:57,969 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 [2022-11-18 18:48:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:57,970 INFO L225 Difference]: With dead ends: 41 [2022-11-18 18:48:57,970 INFO L226 Difference]: Without dead ends: 41 [2022-11-18 18:48:57,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:48:57,972 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:57,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-18 18:48:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2022-11-18 18:48:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-11-18 18:48:57,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 7 [2022-11-18 18:48:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:57,984 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-11-18 18:48:57,985 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) [2022-11-18 18:48:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-11-18 18:48:57,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:48:57,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:57,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:57,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:48:57,991 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:57,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092598, now seen corresponding path program 1 times [2022-11-18 18:48:57,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:57,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746056426] [2022-11-18 18:48:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:57,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:58,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746056426] [2022-11-18 18:48:58,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746056426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:58,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:58,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:48:58,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072188523] [2022-11-18 18:48:58,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:58,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:48:58,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:48:58,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:48:58,249 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:58,297 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-11-18 18:48:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:48:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:48:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:58,299 INFO L225 Difference]: With dead ends: 27 [2022-11-18 18:48:58,299 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 18:48:58,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:48:58,301 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:58,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 21 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 18:48:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-18 18:48:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-18 18:48:58,314 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2022-11-18 18:48:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:58,315 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-18 18:48:58,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-18 18:48:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:48:58,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:58,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:58,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:48:58,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:58,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092651, now seen corresponding path program 1 times [2022-11-18 18:48:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:58,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339667738] [2022-11-18 18:48:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:58,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:58,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:58,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339667738] [2022-11-18 18:48:58,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339667738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:58,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:58,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:48:58,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623934943] [2022-11-18 18:48:58,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:58,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:48:58,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:58,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:48:58,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:48:58,409 INFO L87 Difference]: Start difference. First operand 26 states and 29 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) [2022-11-18 18:48:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:58,445 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-11-18 18:48:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:48:58,445 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 [2022-11-18 18:48:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:58,446 INFO L225 Difference]: With dead ends: 45 [2022-11-18 18:48:58,446 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 18:48:58,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:48:58,470 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:58,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 64 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 18:48:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2022-11-18 18:48:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-18 18:48:58,474 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 7 [2022-11-18 18:48:58,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:58,474 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-18 18:48:58,475 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) [2022-11-18 18:48:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-18 18:48:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:48:58,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:58,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:58,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:48:58,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1806939693, now seen corresponding path program 1 times [2022-11-18 18:48:58,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:58,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066287165] [2022-11-18 18:48:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:58,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:58,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:58,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066287165] [2022-11-18 18:48:58,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066287165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:58,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:58,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:48:58,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741021785] [2022-11-18 18:48:58,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:48:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:48:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:48:58,634 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:58,721 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-18 18:48:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:48:58,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:48:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:58,725 INFO L225 Difference]: With dead ends: 45 [2022-11-18 18:48:58,725 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 18:48:58,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:48:58,726 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:58,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 38 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:48:58,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 18:48:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2022-11-18 18:48:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-18 18:48:58,739 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2022-11-18 18:48:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:58,741 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-18 18:48:58,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-18 18:48:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:48:58,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:58,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:58,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:48:58,743 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash -530059845, now seen corresponding path program 1 times [2022-11-18 18:48:58,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:58,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9488688] [2022-11-18 18:48:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:58,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:58,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:58,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9488688] [2022-11-18 18:48:58,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9488688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:58,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:58,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:48:58,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608554219] [2022-11-18 18:48:58,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:58,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:48:58,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:58,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:48:58,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:48:58,808 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:58,845 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-18 18:48:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:48:58,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 18:48:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:58,846 INFO L225 Difference]: With dead ends: 28 [2022-11-18 18:48:58,846 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 18:48:58,847 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 [2022-11-18 18:48:58,850 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 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 [2022-11-18 18:48:58,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 18:48:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-18 18:48:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-18 18:48:58,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 9 [2022-11-18 18:48:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:58,858 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-18 18:48:58,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:58,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-18 18:48:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:48:58,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:58,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:58,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:48:58,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash -530059844, now seen corresponding path program 1 times [2022-11-18 18:48:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:58,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418700885] [2022-11-18 18:48:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:59,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:59,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418700885] [2022-11-18 18:48:59,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418700885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:59,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:59,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:48:59,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630793989] [2022-11-18 18:48:59,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:59,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:48:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:48:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:48:59,015 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:59,088 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-18 18:48:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:48:59,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 18:48:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:59,092 INFO L225 Difference]: With dead ends: 39 [2022-11-18 18:48:59,093 INFO L226 Difference]: Without dead ends: 39 [2022-11-18 18:48:59,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:48:59,094 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:59,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 39 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-18 18:48:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-11-18 18:48:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-18 18:48:59,104 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 9 [2022-11-18 18:48:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:59,104 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-18 18:48:59,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-18 18:48:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:48:59,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:59,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:59,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 18:48:59,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:59,106 INFO L85 PathProgramCache]: Analyzing trace with hash 748014006, now seen corresponding path program 1 times [2022-11-18 18:48:59,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:59,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920929836] [2022-11-18 18:48:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:59,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:59,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:59,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920929836] [2022-11-18 18:48:59,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920929836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:59,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:59,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:48:59,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921061113] [2022-11-18 18:48:59,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:59,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:48:59,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:48:59,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:48:59,294 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:59,339 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-18 18:48:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:48:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:48:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:59,341 INFO L225 Difference]: With dead ends: 28 [2022-11-18 18:48:59,341 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 18:48:59,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:48:59,342 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 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 [2022-11-18 18:48:59,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 18:48:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-18 18:48:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-18 18:48:59,347 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2022-11-18 18:48:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:59,347 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-18 18:48:59,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-18 18:48:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:48:59,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:59,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:59,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:48:59,349 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:59,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash 748014007, now seen corresponding path program 1 times [2022-11-18 18:48:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:59,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718050023] [2022-11-18 18:48:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:59,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:59,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718050023] [2022-11-18 18:48:59,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718050023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:59,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:59,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:48:59,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408304134] [2022-11-18 18:48:59,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:59,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:48:59,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:48:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:48:59,562 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:59,644 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-11-18 18:48:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:48:59,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:48:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:59,645 INFO L225 Difference]: With dead ends: 50 [2022-11-18 18:48:59,645 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 18:48:59,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:48:59,647 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:59,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 74 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:48:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 18:48:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-11-18 18:48:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-18 18:48:59,656 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 10 [2022-11-18 18:48:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:59,656 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-18 18:48:59,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-18 18:48:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:48:59,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:59,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:59,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:48:59,658 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:59,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:59,658 INFO L85 PathProgramCache]: Analyzing trace with hash -61332619, now seen corresponding path program 1 times [2022-11-18 18:48:59,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:59,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771904959] [2022-11-18 18:48:59,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:59,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:59,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:59,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771904959] [2022-11-18 18:48:59,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771904959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:59,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:59,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:48:59,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706428992] [2022-11-18 18:48:59,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:59,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:48:59,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:59,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:48:59,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:48:59,854 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:59,923 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-18 18:48:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:48:59,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:48:59,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:59,925 INFO L225 Difference]: With dead ends: 41 [2022-11-18 18:48:59,925 INFO L226 Difference]: Without dead ends: 41 [2022-11-18 18:48:59,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:48:59,926 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:59,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-18 18:48:59,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2022-11-18 18:48:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-18 18:48:59,933 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 10 [2022-11-18 18:48:59,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:59,934 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-18 18:48:59,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,934 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-18 18:48:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:48:59,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:59,935 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:59,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:48:59,936 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:48:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2022-11-18 18:48:59,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:59,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767579637] [2022-11-18 18:48:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:59,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:00,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:00,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767579637] [2022-11-18 18:49:00,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767579637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:00,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070530419] [2022-11-18 18:49:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:00,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:00,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:00,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:00,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:49:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:00,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 18:49:00,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:00,438 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 18:49:00,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-18 18:49:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:00,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:01,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070530419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:01,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:01,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-18 18:49:01,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190714628] [2022-11-18 18:49:01,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:01,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:49:01,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:01,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:49:01,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:49:01,046 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:01,407 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-18 18:49:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:49:01,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:49:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:01,408 INFO L225 Difference]: With dead ends: 59 [2022-11-18 18:49:01,408 INFO L226 Difference]: Without dead ends: 59 [2022-11-18 18:49:01,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:49:01,409 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 157 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:01,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 122 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:49:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-18 18:49:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 26. [2022-11-18 18:49:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-18 18:49:01,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2022-11-18 18:49:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:01,412 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-18 18:49:01,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-18 18:49:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:01,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:01,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:01,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:49:01,618 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1794944983, now seen corresponding path program 1 times [2022-11-18 18:49:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:01,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626580130] [2022-11-18 18:49:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:01,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:01,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:01,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626580130] [2022-11-18 18:49:01,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626580130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:01,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:01,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:49:01,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748062963] [2022-11-18 18:49:01,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:01,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:49:01,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:49:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:49:01,848 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:01,937 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-11-18 18:49:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:49:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 18:49:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:01,938 INFO L225 Difference]: With dead ends: 37 [2022-11-18 18:49:01,939 INFO L226 Difference]: Without dead ends: 37 [2022-11-18 18:49:01,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:49:01,942 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:01,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 81 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:49:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-18 18:49:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-11-18 18:49:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) 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) [2022-11-18 18:49:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-18 18:49:01,946 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2022-11-18 18:49:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:01,947 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-18 18:49:01,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-18 18:49:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:01,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:01,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:01,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 18:49:01,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:01,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1401917973, now seen corresponding path program 1 times [2022-11-18 18:49:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:01,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843823058] [2022-11-18 18:49:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:01,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:02,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843823058] [2022-11-18 18:49:02,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843823058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:02,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:02,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:49:02,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065583320] [2022-11-18 18:49:02,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:02,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:49:02,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:02,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:49:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:49:02,185 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:02,320 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-11-18 18:49:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:49:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 18:49:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:02,323 INFO L225 Difference]: With dead ends: 49 [2022-11-18 18:49:02,323 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 18:49:02,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:49:02,324 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:02,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 114 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:49:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 18:49:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2022-11-18 18:49:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.25) 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) [2022-11-18 18:49:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-18 18:49:02,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 13 [2022-11-18 18:49:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:02,330 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-18 18:49:02,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-18 18:49:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:49:02,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:02,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:02,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 18:49:02,334 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:02,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2102982551, now seen corresponding path program 1 times [2022-11-18 18:49:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:02,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152723161] [2022-11-18 18:49:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:02,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:02,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:02,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152723161] [2022-11-18 18:49:02,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152723161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:02,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:02,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:49:02,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986901965] [2022-11-18 18:49:02,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:02,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:49:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:49:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:49:02,590 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:02,785 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-11-18 18:49:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:49:02,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 18:49:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:02,786 INFO L225 Difference]: With dead ends: 44 [2022-11-18 18:49:02,786 INFO L226 Difference]: Without dead ends: 44 [2022-11-18 18:49:02,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:49:02,787 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:02,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 85 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:49:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-18 18:49:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-11-18 18:49:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-11-18 18:49:02,789 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 13 [2022-11-18 18:49:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:02,789 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-11-18 18:49:02,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-11-18 18:49:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:49:02,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:02,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:02,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 18:49:02,790 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:02,790 INFO L85 PathProgramCache]: Analyzing trace with hash -191335553, now seen corresponding path program 1 times [2022-11-18 18:49:02,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:02,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475282595] [2022-11-18 18:49:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:02,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:03,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:03,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475282595] [2022-11-18 18:49:03,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475282595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:03,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:03,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:49:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008925727] [2022-11-18 18:49:03,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:03,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:49:03,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:49:03,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:49:03,003 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:03,046 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-11-18 18:49:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:49:03,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 18:49:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:03,047 INFO L225 Difference]: With dead ends: 31 [2022-11-18 18:49:03,047 INFO L226 Difference]: Without dead ends: 20 [2022-11-18 18:49:03,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:49:03,048 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:03,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 38 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:49:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-18 18:49:03,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-18 18:49:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-18 18:49:03,050 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-11-18 18:49:03,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:03,051 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-18 18:49:03,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-18 18:49:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 18:49:03,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:03,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:03,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 18:49:03,054 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:03,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash 70337178, now seen corresponding path program 1 times [2022-11-18 18:49:03,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:03,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435564415] [2022-11-18 18:49:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:03,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:03,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:03,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435564415] [2022-11-18 18:49:03,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435564415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:03,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902446512] [2022-11-18 18:49:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:03,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:03,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:03,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:03,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:49:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 18:49:03,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:03,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:03,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 18:49:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:03,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902446512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:03,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:03,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-18 18:49:03,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273583885] [2022-11-18 18:49:03,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:03,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:49:03,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:03,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:49:03,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:49:03,699 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:03,923 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-11-18 18:49:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:49:03,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 18:49:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:03,924 INFO L225 Difference]: With dead ends: 30 [2022-11-18 18:49:03,924 INFO L226 Difference]: Without dead ends: 30 [2022-11-18 18:49:03,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:49:03,925 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 125 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:03,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 57 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:49:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-18 18:49:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2022-11-18 18:49:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-18 18:49:03,927 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2022-11-18 18:49:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:03,927 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-18 18:49:03,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-18 18:49:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 18:49:03,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:03,928 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:03,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:04,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:04,128 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:04,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2114514791, now seen corresponding path program 1 times [2022-11-18 18:49:04,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:04,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049857303] [2022-11-18 18:49:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:04,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:04,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:04,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049857303] [2022-11-18 18:49:04,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049857303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:04,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62375515] [2022-11-18 18:49:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:04,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:04,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:04,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:49:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:04,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 18:49:04,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:49:04,573 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 [2022-11-18 18:49:04,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:49:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:04,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:04,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:49:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:04,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62375515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:04,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:04,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-11-18 18:49:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708416073] [2022-11-18 18:49:04,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:49:04,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:49:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:49:04,995 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:05,444 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-11-18 18:49:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:49:05,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 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) Word has length 18 [2022-11-18 18:49:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:05,445 INFO L225 Difference]: With dead ends: 29 [2022-11-18 18:49:05,445 INFO L226 Difference]: Without dead ends: 29 [2022-11-18 18:49:05,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:49:05,446 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 136 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:05,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 46 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:49:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-18 18:49:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-11-18 18:49:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-18 18:49:05,447 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2022-11-18 18:49:05,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:05,448 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-18 18:49:05,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:05,448 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-18 18:49:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 18:49:05,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:05,449 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:05,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:05,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:05,649 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:05,650 INFO L85 PathProgramCache]: Analyzing trace with hash 775185845, now seen corresponding path program 2 times [2022-11-18 18:49:05,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:05,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062864393] [2022-11-18 18:49:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:05,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:06,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:06,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062864393] [2022-11-18 18:49:06,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062864393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:06,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538807745] [2022-11-18 18:49:06,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:49:06,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:06,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:06,135 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:06,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:49:06,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:06,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:06,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 18:49:06,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:06,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:49:06,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:49:06,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-18 18:49:06,710 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-11-18 18:49:06,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-11-18 18:49:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:06,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:07,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:49:07,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-18 18:49:07,022 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-18 18:49:07,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-18 18:49:07,039 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-11-18 18:49:07,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 35 [2022-11-18 18:49:07,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:49:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:07,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538807745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:07,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:07,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-11-18 18:49:07,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108346010] [2022-11-18 18:49:07,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:07,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 18:49:07,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 18:49:07,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=693, Unknown=10, NotChecked=0, Total=812 [2022-11-18 18:49:07,249 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:07,885 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-11-18 18:49:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:49:07,886 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 18:49:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:07,886 INFO L225 Difference]: With dead ends: 40 [2022-11-18 18:49:07,886 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 18:49:07,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=292, Invalid=1258, Unknown=10, NotChecked=0, Total=1560 [2022-11-18 18:49:07,887 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 86 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:07,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 137 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2022-11-18 18:49:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 18:49:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-11-18 18:49:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-11-18 18:49:07,889 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2022-11-18 18:49:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:07,889 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-11-18 18:49:07,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-11-18 18:49:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 18:49:07,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:07,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:07,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:08,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 18:49:08,091 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash 643759544, now seen corresponding path program 3 times [2022-11-18 18:49:08,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:08,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137159842] [2022-11-18 18:49:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:08,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:08,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:08,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137159842] [2022-11-18 18:49:08,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137159842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:08,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324636590] [2022-11-18 18:49:08,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:49:08,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:08,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:08,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:08,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:49:08,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 18:49:08,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:08,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 18:49:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:08,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:08,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 18:49:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:08,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324636590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:08,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:08,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-11-18 18:49:08,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241536265] [2022-11-18 18:49:08,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:08,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:49:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:08,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:49:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:49:08,843 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:09,132 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-11-18 18:49:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:49:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-18 18:49:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:09,136 INFO L225 Difference]: With dead ends: 35 [2022-11-18 18:49:09,136 INFO L226 Difference]: Without dead ends: 35 [2022-11-18 18:49:09,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:49:09,137 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 106 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:09,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 74 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:49:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-18 18:49:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-11-18 18:49:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-11-18 18:49:09,142 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2022-11-18 18:49:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:09,142 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-11-18 18:49:09,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-11-18 18:49:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 18:49:09,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:09,143 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:09,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:09,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 18:49:09,351 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1518290629, now seen corresponding path program 2 times [2022-11-18 18:49:09,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:09,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993369408] [2022-11-18 18:49:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:09,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:09,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993369408] [2022-11-18 18:49:09,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993369408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:09,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954813228] [2022-11-18 18:49:09,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:49:09,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:09,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:09,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:09,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:49:09,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:09,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:09,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 18:49:09,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:09,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:49:09,931 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 [2022-11-18 18:49:09,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:49:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:10,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:10,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:49:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:10,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954813228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:10,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:10,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-11-18 18:49:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123539097] [2022-11-18 18:49:10,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:10,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:49:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:49:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:49:10,614 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 26 states, 25 states have (on average 3.04) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:11,234 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-11-18 18:49:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:49:11,234 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.04) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 18:49:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:11,235 INFO L225 Difference]: With dead ends: 34 [2022-11-18 18:49:11,235 INFO L226 Difference]: Without dead ends: 34 [2022-11-18 18:49:11,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 18:49:11,236 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 207 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:11,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 73 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:49:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-18 18:49:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-11-18 18:49:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-11-18 18:49:11,238 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2022-11-18 18:49:11,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:11,238 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-11-18 18:49:11,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.04) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-11-18 18:49:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 18:49:11,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:11,240 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:11,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:11,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 18:49:11,446 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:49:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:11,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1095540269, now seen corresponding path program 4 times [2022-11-18 18:49:11,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:11,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081636336] [2022-11-18 18:49:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:11,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:11,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:11,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081636336] [2022-11-18 18:49:11,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081636336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:11,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790712434] [2022-11-18 18:49:11,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:49:11,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:11,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:11,939 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:11,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:49:12,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:49:12,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:12,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 18:49:12,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:12,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:49:12,328 INFO L321 Elim1Store]: treesize reduction 39, result has 56.2 percent of original size [2022-11-18 18:49:12,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 63 [2022-11-18 18:49:13,360 INFO L321 Elim1Store]: treesize reduction 82, result has 62.2 percent of original size [2022-11-18 18:49:13,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 220 [2022-11-18 18:49:39,734 WARN L233 SmtUtils]: Spent 19.09s on a formula simplification. DAG size of input: 230 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:49:42,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:49:42,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 214 treesize of output 362 [2022-11-18 18:49:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:49:49,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:53,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 837 treesize of output 825 [2022-11-18 18:49:53,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 768 treesize of output 746 [2022-11-18 18:49:53,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:49:53,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2022-11-18 18:49:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:49:53,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790712434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:53,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:53,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 41 [2022-11-18 18:49:53,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414676966] [2022-11-18 18:49:53,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:53,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 18:49:53,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:53,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 18:49:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 18:49:53,805 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:08,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:08,891 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2022-11-18 18:50:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 18:50:08,892 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 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 29 [2022-11-18 18:50:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:08,892 INFO L225 Difference]: With dead ends: 51 [2022-11-18 18:50:08,892 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 18:50:08,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=461, Invalid=3444, Unknown=1, NotChecked=0, Total=3906 [2022-11-18 18:50:08,894 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:08,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-11-18 18:50:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 18:50:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-11-18 18:50:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-18 18:50:08,896 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2022-11-18 18:50:08,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:08,897 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-18 18:50:08,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-18 18:50:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 18:50:08,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:08,898 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:08,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 18:50:09,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:09,103 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:50:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:09,103 INFO L85 PathProgramCache]: Analyzing trace with hash 651531229, now seen corresponding path program 3 times [2022-11-18 18:50:09,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:09,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422836645] [2022-11-18 18:50:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:09,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:09,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:09,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422836645] [2022-11-18 18:50:09,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422836645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:09,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555555659] [2022-11-18 18:50:09,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:50:09,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:09,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:09,793 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:09,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:50:10,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 18:50:10,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:10,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:50:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:10,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:10,146 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 [2022-11-18 18:50:10,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:50:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:10,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:11,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:50:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:11,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555555659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:11,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:11,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-11-18 18:50:11,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204308706] [2022-11-18 18:50:11,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:11,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 18:50:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 18:50:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-11-18 18:50:11,221 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:12,035 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-11-18 18:50:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:50:12,036 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-18 18:50:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:12,036 INFO L225 Difference]: With dead ends: 41 [2022-11-18 18:50:12,036 INFO L226 Difference]: Without dead ends: 41 [2022-11-18 18:50:12,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 18:50:12,038 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 212 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:12,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 109 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:50:12,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-18 18:50:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-11-18 18:50:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-18 18:50:12,040 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-11-18 18:50:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:12,040 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-18 18:50:12,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-18 18:50:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 18:50:12,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:12,041 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:12,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:12,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 18:50:12,250 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:50:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash -671378910, now seen corresponding path program 4 times [2022-11-18 18:50:12,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:12,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542570028] [2022-11-18 18:50:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:12,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:12,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542570028] [2022-11-18 18:50:12,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542570028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656102135] [2022-11-18 18:50:12,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:50:12,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:12,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:12,851 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:12,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:50:13,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:50:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:13,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 18:50:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:13,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:50:13,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:13,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:50:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:13,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:50:13,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:13,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:50:13,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:50:13,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:13,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:50:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:13,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:37,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 332 treesize of output 320 [2022-11-18 18:50:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:38,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656102135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:38,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:38,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-11-18 18:50:38,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314885288] [2022-11-18 18:50:38,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:38,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 18:50:38,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:38,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 18:50:38,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1440, Unknown=8, NotChecked=0, Total=1560 [2022-11-18 18:50:38,571 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:40,007 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2022-11-18 18:50:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:50:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-18 18:50:40,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:40,009 INFO L225 Difference]: With dead ends: 63 [2022-11-18 18:50:40,009 INFO L226 Difference]: Without dead ends: 46 [2022-11-18 18:50:40,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=235, Invalid=2727, Unknown=8, NotChecked=0, Total=2970 [2022-11-18 18:50:40,011 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:40,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 279 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 282 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-11-18 18:50:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-18 18:50:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-11-18 18:50:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-18 18:50:40,013 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-11-18 18:50:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:40,013 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-18 18:50:40,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-18 18:50:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 18:50:40,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:40,014 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:40,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 18:50:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:40,221 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:50:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash -452353921, now seen corresponding path program 5 times [2022-11-18 18:50:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:40,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944666309] [2022-11-18 18:50:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:40,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:41,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:41,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944666309] [2022-11-18 18:50:41,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944666309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:41,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515165043] [2022-11-18 18:50:41,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:50:41,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:41,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:41,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:41,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:50:41,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 18:50:41,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 18:50:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:41,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:41,332 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 [2022-11-18 18:50:41,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:50:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:42,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:42,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:50:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:43,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515165043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:43,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:43,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-11-18 18:50:43,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139740500] [2022-11-18 18:50:43,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:43,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 18:50:43,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 18:50:43,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:50:43,028 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 38 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:44,258 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-18 18:50:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:50:44,259 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 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 [2022-11-18 18:50:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:44,259 INFO L225 Difference]: With dead ends: 49 [2022-11-18 18:50:44,259 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 18:50:44,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 18:50:44,262 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 320 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:44,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 173 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:50:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 18:50:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-11-18 18:50:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-11-18 18:50:44,265 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2022-11-18 18:50:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:44,265 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-11-18 18:50:44,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-11-18 18:50:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 18:50:44,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:44,266 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:44,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:44,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 18:50:44,473 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:50:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash 238321092, now seen corresponding path program 6 times [2022-11-18 18:50:44,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:44,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668633536] [2022-11-18 18:50:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:44,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:45,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668633536] [2022-11-18 18:50:45,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668633536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:45,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473526437] [2022-11-18 18:50:45,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:50:45,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:45,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:45,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:45,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:50:45,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 18:50:45,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:45,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-18 18:50:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:45,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:50:46,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:50:46,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:46,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:46,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:46,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:46,927 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:50:46,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:50:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:46,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:47,371 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2022-11-18 18:50:47,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:47,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:50:47,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:47,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:50:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2022-11-18 18:50:47,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473526437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:47,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:47,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 40 [2022-11-18 18:50:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715121761] [2022-11-18 18:50:47,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:47,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 18:50:47,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 18:50:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1327, Unknown=51, NotChecked=74, Total=1560 [2022-11-18 18:50:47,943 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:49,345 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2022-11-18 18:50:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:50:49,346 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-18 18:50:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:49,347 INFO L225 Difference]: With dead ends: 75 [2022-11-18 18:50:49,347 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 18:50:49,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=250, Invalid=2893, Unknown=53, NotChecked=110, Total=3306 [2022-11-18 18:50:49,349 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:49,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 288 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 286 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2022-11-18 18:50:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 18:50:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-11-18 18:50:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-18 18:50:49,352 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-11-18 18:50:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:49,352 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-18 18:50:49,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-18 18:50:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 18:50:49,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:49,353 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:49,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:49,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 18:50:49,554 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:50:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash -936321247, now seen corresponding path program 7 times [2022-11-18 18:50:49,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:49,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340441220] [2022-11-18 18:50:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:49,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:50,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:50,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340441220] [2022-11-18 18:50:50,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340441220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112861988] [2022-11-18 18:50:50,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:50:50,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:50,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:50,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:50:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:50,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 18:50:50,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:50,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:50:50,605 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 [2022-11-18 18:50:50,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:50:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:51,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:52,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:50:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 45 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:52,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112861988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:52,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:52,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2022-11-18 18:50:52,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461727879] [2022-11-18 18:50:52,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:52,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-18 18:50:52,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:52,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-18 18:50:52,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1716, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 18:50:52,902 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 44 states, 43 states have (on average 3.441860465116279) internal successors, (148), 44 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:54,444 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-11-18 18:50:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:50:54,444 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.441860465116279) internal successors, (148), 44 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-18 18:50:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:54,445 INFO L225 Difference]: With dead ends: 57 [2022-11-18 18:50:54,445 INFO L226 Difference]: Without dead ends: 57 [2022-11-18 18:50:54,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=506, Invalid=2686, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 18:50:54,447 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 326 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:54,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 213 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 18:50:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-18 18:50:54,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-11-18 18:50:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-11-18 18:50:54,451 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-11-18 18:50:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:54,451 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-11-18 18:50:54,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.441860465116279) internal successors, (148), 44 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-11-18 18:50:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-18 18:50:54,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:54,453 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:54,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:54,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 18:50:54,659 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:50:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2021104486, now seen corresponding path program 8 times [2022-11-18 18:50:54,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:54,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816925366] [2022-11-18 18:50:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 51 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:55,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816925366] [2022-11-18 18:50:55,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816925366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563012271] [2022-11-18 18:50:55,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:50:55,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:55,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:55,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:55,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:50:55,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:50:55,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:55,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-18 18:50:55,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:55,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:50:56,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:50:56,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:56,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:57,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:57,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:57,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:50:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:50:57,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:57,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:50:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:57,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:57,844 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_623 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_623) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-18 18:50:57,854 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_623 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_623) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2022-11-18 18:50:58,007 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_623 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_623) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)))) is different from false [2022-11-18 18:50:58,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:58,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:50:58,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:50:58,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-18 18:50:58,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 18:50:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 40 not checked. [2022-11-18 18:50:59,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563012271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:59,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:59,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2022-11-18 18:50:59,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854839800] [2022-11-18 18:50:59,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:59,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 18:50:59,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:59,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 18:50:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2279, Unknown=34, NotChecked=294, Total=2756 [2022-11-18 18:50:59,543 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:01,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:01,893 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2022-11-18 18:51:01,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 18:51:01,894 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-18 18:51:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:01,894 INFO L225 Difference]: With dead ends: 87 [2022-11-18 18:51:01,895 INFO L226 Difference]: Without dead ends: 62 [2022-11-18 18:51:01,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=335, Invalid=4611, Unknown=36, NotChecked=420, Total=5402 [2022-11-18 18:51:01,897 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:01,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 475 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 421 Invalid, 0 Unknown, 230 Unchecked, 0.4s Time] [2022-11-18 18:51:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-18 18:51:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-11-18 18:51:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-11-18 18:51:01,901 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-11-18 18:51:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:01,901 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-11-18 18:51:01,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.792452830188679) internal successors, (148), 53 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-11-18 18:51:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-18 18:51:01,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:01,903 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:01,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:51:02,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:02,109 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:51:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1096765379, now seen corresponding path program 9 times [2022-11-18 18:51:02,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:02,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872370197] [2022-11-18 18:51:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:02,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:03,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:03,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872370197] [2022-11-18 18:51:03,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872370197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:51:03,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362991324] [2022-11-18 18:51:03,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:51:03,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:03,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:51:03,142 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:51:03,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:51:03,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-18 18:51:03,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:51:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-18 18:51:03,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:51:03,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:51:03,640 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 [2022-11-18 18:51:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:04,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:51:06,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:51:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 66 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:06,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362991324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:51:06,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:51:06,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2022-11-18 18:51:06,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650799098] [2022-11-18 18:51:06,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:51:06,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:51:06,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:51:06,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:51:06,344 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 50 states, 49 states have (on average 3.510204081632653) internal successors, (172), 50 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:08,735 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-11-18 18:51:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:51:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.510204081632653) internal successors, (172), 50 states have internal predecessors, (172), 0 states have call successors, (0), 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 58 [2022-11-18 18:51:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:08,736 INFO L225 Difference]: With dead ends: 65 [2022-11-18 18:51:08,736 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 18:51:08,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=695, Invalid=3465, Unknown=0, NotChecked=0, Total=4160 [2022-11-18 18:51:08,739 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 434 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:08,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 245 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 18:51:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 18:51:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-11-18 18:51:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-11-18 18:51:08,742 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2022-11-18 18:51:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:08,742 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-11-18 18:51:08,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.510204081632653) internal successors, (172), 50 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-11-18 18:51:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 18:51:08,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:08,744 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:08,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:51:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:08,951 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:51:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash -572986616, now seen corresponding path program 10 times [2022-11-18 18:51:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:08,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439872872] [2022-11-18 18:51:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:08,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 73 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:10,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:10,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439872872] [2022-11-18 18:51:10,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439872872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:51:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125553901] [2022-11-18 18:51:10,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:51:10,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:51:10,139 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:51:10,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:51:10,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:51:10,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:51:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-18 18:51:10,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:51:11,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:51:11,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:51:11,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:51:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:51:11,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:51:11,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:51:11,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:51:11,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:51:11,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:51:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:51:11,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:51:12,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:51:12,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:51:12,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:51:12,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:51:12,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:51:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:12,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:51:16,523 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~to#1.offset_96| Int) (|ULTIMATE.start_cstrcpy_~to#1.base| Int) (v_ArrVal_758 Int) (|v_ULTIMATE.start_cstrcpy_~to#1.offset_101| Int) (v_ArrVal_768 Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrcpy_~to#1.base| (store (store (select |c_#memory_int| |ULTIMATE.start_cstrcpy_~to#1.base|) |v_ULTIMATE.start_cstrcpy_~to#1.offset_101| v_ArrVal_758) |v_ULTIMATE.start_cstrcpy_~to#1.offset_96| v_ArrVal_768)) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0) (< (+ 5 |v_ULTIMATE.start_cstrcpy_~to#1.offset_101|) |v_ULTIMATE.start_cstrcpy_~to#1.offset_96|) (< |c_ULTIMATE.start_main_~nondetArea~0#1.offset| |v_ULTIMATE.start_cstrcpy_~to#1.offset_101|))) is different from false [2022-11-18 18:51:16,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 332 treesize of output 320 [2022-11-18 18:51:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:17,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125553901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:51:17,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:51:17,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 22] total 58 [2022-11-18 18:51:17,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393517700] [2022-11-18 18:51:17,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:51:17,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-18 18:51:17,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:17,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-18 18:51:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3027, Unknown=1, NotChecked=110, Total=3306 [2022-11-18 18:51:17,782 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 58 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:20,821 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2022-11-18 18:51:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:51:20,821 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 58 states have internal predecessors, (172), 0 states have call successors, (0), 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 62 [2022-11-18 18:51:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:20,822 INFO L225 Difference]: With dead ends: 99 [2022-11-18 18:51:20,822 INFO L226 Difference]: Without dead ends: 70 [2022-11-18 18:51:20,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=392, Invalid=6091, Unknown=1, NotChecked=158, Total=6642 [2022-11-18 18:51:20,826 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 73 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:20,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 619 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 521 Invalid, 0 Unknown, 247 Unchecked, 0.5s Time] [2022-11-18 18:51:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-18 18:51:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-11-18 18:51:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-11-18 18:51:20,829 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-11-18 18:51:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:20,830 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-11-18 18:51:20,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 58 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-11-18 18:51:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 18:51:20,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:20,831 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:20,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-18 18:51:21,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:21,039 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:51:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash -894897563, now seen corresponding path program 11 times [2022-11-18 18:51:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:21,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78126110] [2022-11-18 18:51:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:22,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78126110] [2022-11-18 18:51:22,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78126110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:51:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950494272] [2022-11-18 18:51:22,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:51:22,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:22,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:51:22,358 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:51:22,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:51:23,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 18:51:23,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:51:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-18 18:51:23,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:51:23,090 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-11-18 18:51:23,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-18 18:51:23,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:51:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:26,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:51:28,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:51:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:28,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950494272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:51:28,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:51:28,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 22] total 59 [2022-11-18 18:51:28,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977288056] [2022-11-18 18:51:28,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:51:28,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-18 18:51:28,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:28,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-18 18:51:28,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=3174, Unknown=0, NotChecked=0, Total=3540 [2022-11-18 18:51:28,582 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 60 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:34,700 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2022-11-18 18:51:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 18:51:34,701 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-18 18:51:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:34,702 INFO L225 Difference]: With dead ends: 119 [2022-11-18 18:51:34,702 INFO L226 Difference]: Without dead ends: 119 [2022-11-18 18:51:34,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1283, Invalid=7837, Unknown=0, NotChecked=0, Total=9120 [2022-11-18 18:51:34,704 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 956 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:34,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 350 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 18:51:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-18 18:51:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 71. [2022-11-18 18:51:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-11-18 18:51:34,707 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2022-11-18 18:51:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:34,708 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-11-18 18:51:34,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-11-18 18:51:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 18:51:34,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:34,709 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:34,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:51:34,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-18 18:51:34,910 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:51:34,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:34,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1905496918, now seen corresponding path program 12 times [2022-11-18 18:51:34,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:34,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238014097] [2022-11-18 18:51:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:34,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 99 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:36,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238014097] [2022-11-18 18:51:36,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238014097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:51:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176675597] [2022-11-18 18:51:36,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:51:36,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:51:36,349 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:51:36,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:51:37,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 18:51:37,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:51:37,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-18 18:51:37,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:51:37,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:51:37,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:51:38,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:51:38,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:51:38,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:51:38,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:51:38,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:51:38,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:51:39,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:51:39,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:51:39,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-18 18:51:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 23 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:39,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:51:39,489 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_927 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_927) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-18 18:51:39,499 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_927 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_927) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2022-11-18 18:51:39,516 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_927 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_927) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2022-11-18 18:51:39,689 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_927 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_927) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2022-11-18 18:51:39,706 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_927 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_927) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2022-11-18 18:51:39,879 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_927 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_927) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-18 18:51:39,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:51:39,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:51:39,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:51:39,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:51:39,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-18 18:51:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 23 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 90 not checked. [2022-11-18 18:51:41,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176675597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:51:41,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:51:41,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 63 [2022-11-18 18:51:41,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010141967] [2022-11-18 18:51:41,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:51:41,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-18 18:51:41,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:41,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-18 18:51:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3000, Unknown=38, NotChecked=690, Total=3906 [2022-11-18 18:51:41,051 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:44,628 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2022-11-18 18:51:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 18:51:44,629 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-18 18:51:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:44,630 INFO L225 Difference]: With dead ends: 111 [2022-11-18 18:51:44,630 INFO L226 Difference]: Without dead ends: 78 [2022-11-18 18:51:44,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=425, Invalid=6367, Unknown=38, NotChecked=1002, Total=7832 [2022-11-18 18:51:44,632 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:44,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 678 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 652 Invalid, 0 Unknown, 432 Unchecked, 0.6s Time] [2022-11-18 18:51:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-18 18:51:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-11-18 18:51:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-18 18:51:44,636 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2022-11-18 18:51:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:44,636 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-18 18:51:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-18 18:51:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 18:51:44,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:44,638 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:44,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:51:44,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-18 18:51:44,846 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:51:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1730266887, now seen corresponding path program 13 times [2022-11-18 18:51:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:44,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358094625] [2022-11-18 18:51:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:44,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:46,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358094625] [2022-11-18 18:51:46,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358094625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:51:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181074883] [2022-11-18 18:51:46,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:51:46,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:46,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:51:46,306 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:51:46,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:51:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:46,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 18:51:46,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:51:46,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:51:46,588 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 [2022-11-18 18:51:46,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:51:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 91 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:48,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:51:50,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:51:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 120 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:50,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181074883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:51:50,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:51:50,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2022-11-18 18:51:50,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222467522] [2022-11-18 18:51:50,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:51:50,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 18:51:50,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 18:51:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=3465, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 18:51:50,191 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 62 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 62 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:53,177 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2022-11-18 18:51:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:51:53,177 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 62 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-18 18:51:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:53,178 INFO L225 Difference]: With dead ends: 81 [2022-11-18 18:51:53,178 INFO L226 Difference]: Without dead ends: 81 [2022-11-18 18:51:53,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=983, Invalid=5497, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 18:51:53,180 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 444 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:53,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 475 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 18:51:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-18 18:51:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-11-18 18:51:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-11-18 18:51:53,183 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-11-18 18:51:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:53,184 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-11-18 18:51:53,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 62 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-11-18 18:51:53,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-18 18:51:53,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:53,186 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:53,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:51:53,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:53,399 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:51:53,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:53,399 INFO L85 PathProgramCache]: Analyzing trace with hash -481943476, now seen corresponding path program 14 times [2022-11-18 18:51:53,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:53,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291350462] [2022-11-18 18:51:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:53,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 129 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:55,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291350462] [2022-11-18 18:51:55,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291350462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:51:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397339569] [2022-11-18 18:51:55,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:51:55,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:55,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:51:55,023 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:51:55,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:51:55,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:51:55,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:51:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-18 18:51:55,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:51:55,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:51:56,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:51:56,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:51:56,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:51:56,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:51:56,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:51:56,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:51:57,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:51:57,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:51:57,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:51:57,678 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:51:57,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:51:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 26 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:57,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:51:57,927 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1102 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1102) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-18 18:51:58,419 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1102 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1102) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2022-11-18 18:51:58,435 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1102 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1102) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2022-11-18 18:51:58,604 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1102 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1102) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2022-11-18 18:51:58,621 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1102 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1102) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-18 18:51:58,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:51:58,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:51:58,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:51:58,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:51:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 26 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 91 not checked. [2022-11-18 18:51:59,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397339569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:51:59,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:51:59,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 60 [2022-11-18 18:51:59,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868821663] [2022-11-18 18:51:59,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:51:59,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-18 18:51:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-18 18:51:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2729, Unknown=87, NotChecked=550, Total=3540 [2022-11-18 18:51:59,128 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 60 states, 60 states have (on average 3.183333333333333) internal successors, (191), 60 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:02,917 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2022-11-18 18:52:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 18:52:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.183333333333333) internal successors, (191), 60 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-18 18:52:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:02,918 INFO L225 Difference]: With dead ends: 123 [2022-11-18 18:52:02,919 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 18:52:02,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=458, Invalid=6615, Unknown=87, NotChecked=850, Total=8010 [2022-11-18 18:52:02,920 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:02,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 761 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 736 Invalid, 0 Unknown, 485 Unchecked, 0.6s Time] [2022-11-18 18:52:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 18:52:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2022-11-18 18:52:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-11-18 18:52:02,924 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2022-11-18 18:52:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:02,925 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-11-18 18:52:02,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.183333333333333) internal successors, (191), 60 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-11-18 18:52:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 18:52:02,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:02,926 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:02,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-18 18:52:03,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 18:52:03,134 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:52:03,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:03,134 INFO L85 PathProgramCache]: Analyzing trace with hash 584961449, now seen corresponding path program 15 times [2022-11-18 18:52:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:03,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129139675] [2022-11-18 18:52:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:03,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 91 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:04,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129139675] [2022-11-18 18:52:04,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129139675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:52:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498276540] [2022-11-18 18:52:04,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:52:04,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:52:04,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:52:04,834 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:52:04,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 18:52:06,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-18 18:52:06,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-18 18:52:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:06,502 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:52:06,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:52:06,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:52:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 120 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:08,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:10,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:52:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 153 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:10,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498276540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:10,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:52:10,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2022-11-18 18:52:10,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411707673] [2022-11-18 18:52:10,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:10,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-18 18:52:10,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-18 18:52:10,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=4128, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 18:52:10,702 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 68 states, 67 states have (on average 3.6417910447761193) internal successors, (244), 68 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:14,017 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2022-11-18 18:52:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 18:52:14,018 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.6417910447761193) internal successors, (244), 68 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-18 18:52:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:14,019 INFO L225 Difference]: With dead ends: 89 [2022-11-18 18:52:14,019 INFO L226 Difference]: Without dead ends: 89 [2022-11-18 18:52:14,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1292, Invalid=6540, Unknown=0, NotChecked=0, Total=7832 [2022-11-18 18:52:14,020 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 571 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:14,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 447 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 18:52:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-18 18:52:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-11-18 18:52:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-11-18 18:52:14,024 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2022-11-18 18:52:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:14,024 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-11-18 18:52:14,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.6417910447761193) internal successors, (244), 68 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-11-18 18:52:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-18 18:52:14,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:14,026 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:14,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 18:52:14,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-18 18:52:14,235 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:52:14,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:14,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1099299346, now seen corresponding path program 16 times [2022-11-18 18:52:14,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:14,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340192216] [2022-11-18 18:52:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:14,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 163 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:16,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:16,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340192216] [2022-11-18 18:52:16,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340192216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:52:16,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287581377] [2022-11-18 18:52:16,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:52:16,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:52:16,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:52:16,228 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:52:16,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 18:52:16,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:52:16,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-18 18:52:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:16,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:52:17,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:52:17,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:52:18,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:52:18,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:52:18,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:52:18,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:52:18,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:52:18,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:52:19,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:52:19,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:52:19,707 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:52:19,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:52:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:19,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:19,981 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1295) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-18 18:52:19,992 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1295) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2022-11-18 18:52:20,185 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1295) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2022-11-18 18:52:20,205 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1295) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2022-11-18 18:52:20,222 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1295) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2022-11-18 18:52:20,405 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1295) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2022-11-18 18:52:20,422 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1295) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2022-11-18 18:52:20,438 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 9 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-18 18:52:20,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:52:20,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:52:20,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:52:20,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:52:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 156 not checked. [2022-11-18 18:52:21,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287581377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:21,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:52:21,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 65 [2022-11-18 18:52:21,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401638608] [2022-11-18 18:52:21,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:21,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-18 18:52:21,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-18 18:52:21,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2982, Unknown=51, NotChecked=936, Total=4160 [2022-11-18 18:52:21,009 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 65 states, 65 states have (on average 3.246153846153846) internal successors, (211), 65 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:25,565 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2022-11-18 18:52:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 18:52:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.246153846153846) internal successors, (211), 65 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-18 18:52:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:25,566 INFO L225 Difference]: With dead ends: 135 [2022-11-18 18:52:25,566 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 18:52:25,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 8 IntricatePredicates, 2 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=515, Invalid=7475, Unknown=52, NotChecked=1464, Total=9506 [2022-11-18 18:52:25,568 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 770 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:25,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 849 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 773 Invalid, 0 Unknown, 770 Unchecked, 0.7s Time] [2022-11-18 18:52:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 18:52:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-11-18 18:52:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-11-18 18:52:25,574 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-11-18 18:52:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:25,574 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-11-18 18:52:25,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.246153846153846) internal successors, (211), 65 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-11-18 18:52:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 18:52:25,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:25,576 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:25,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 18:52:25,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 18:52:25,777 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:52:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1829697973, now seen corresponding path program 17 times [2022-11-18 18:52:25,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:25,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373215097] [2022-11-18 18:52:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 120 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373215097] [2022-11-18 18:52:27,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373215097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:52:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858217143] [2022-11-18 18:52:27,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:52:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:52:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:52:27,635 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:52:27,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 18:52:28,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-18 18:52:28,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:28,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-18 18:52:28,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:28,633 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:52:28,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:52:28,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:52:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 153 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:31,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:33,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:52:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 190 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:33,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858217143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:33,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:52:33,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 71 [2022-11-18 18:52:33,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145651913] [2022-11-18 18:52:33,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:33,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-18 18:52:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-18 18:52:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4638, Unknown=0, NotChecked=0, Total=5112 [2022-11-18 18:52:33,494 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 72 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 72 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:36,478 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-11-18 18:52:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 18:52:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 72 states have internal predecessors, (268), 0 states have call successors, (0), 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 90 [2022-11-18 18:52:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:36,479 INFO L225 Difference]: With dead ends: 97 [2022-11-18 18:52:36,479 INFO L226 Difference]: Without dead ends: 97 [2022-11-18 18:52:36,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1427, Invalid=7503, Unknown=0, NotChecked=0, Total=8930 [2022-11-18 18:52:36,481 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 468 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:36,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 577 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 18:52:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-18 18:52:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-11-18 18:52:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-11-18 18:52:36,486 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2022-11-18 18:52:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:36,486 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-11-18 18:52:36,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 72 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-11-18 18:52:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-18 18:52:36,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:36,488 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:36,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 18:52:36,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:52:36,696 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:52:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:36,697 INFO L85 PathProgramCache]: Analyzing trace with hash 186391952, now seen corresponding path program 18 times [2022-11-18 18:52:36,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:36,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383102888] [2022-11-18 18:52:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:36,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 201 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:38,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:38,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383102888] [2022-11-18 18:52:38,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383102888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:52:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644646296] [2022-11-18 18:52:38,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:52:38,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:52:38,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:52:38,727 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:52:38,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 18:52:40,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-18 18:52:40,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:40,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-18 18:52:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:40,076 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:52:40,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:52:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 11 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:42,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:47,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644646296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:47,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:52:47,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 81 [2022-11-18 18:52:47,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327372331] [2022-11-18 18:52:47,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:47,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-18 18:52:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-18 18:52:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=5822, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 18:52:47,576 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 81 states, 81 states have (on average 3.3703703703703702) internal successors, (273), 81 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:52,531 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2022-11-18 18:52:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-18 18:52:52,532 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.3703703703703702) internal successors, (273), 81 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 94 [2022-11-18 18:52:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:52,533 INFO L225 Difference]: With dead ends: 146 [2022-11-18 18:52:52,533 INFO L226 Difference]: Without dead ends: 99 [2022-11-18 18:52:52,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 141 SyntacticMatches, 12 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1224, Invalid=10332, Unknown=0, NotChecked=0, Total=11556 [2022-11-18 18:52:52,535 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 117 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:52,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 780 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1173 Invalid, 0 Unknown, 671 Unchecked, 1.0s Time] [2022-11-18 18:52:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-18 18:52:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-18 18:52:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-11-18 18:52:52,539 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-11-18 18:52:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:52,539 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-11-18 18:52:52,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.3703703703703702) internal successors, (273), 81 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-11-18 18:52:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-18 18:52:52,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:52,541 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:52,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 18:52:52,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 18:52:52,742 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:52:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:52,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1433366765, now seen corresponding path program 19 times [2022-11-18 18:52:52,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:52,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028973387] [2022-11-18 18:52:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:52,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 153 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:54,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:54,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028973387] [2022-11-18 18:52:54,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028973387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:52:54,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933973001] [2022-11-18 18:52:54,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:52:54,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:52:54,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:52:54,658 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:52:54,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 18:52:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-18 18:52:54,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:55,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:52:55,009 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 [2022-11-18 18:52:55,013 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 10 treesize of output 8 [2022-11-18 18:52:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 190 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:57,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:00,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:53:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 231 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:00,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933973001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:00,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:53:00,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 79 [2022-11-18 18:53:00,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513902332] [2022-11-18 18:53:00,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:00,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-18 18:53:00,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:00,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-18 18:53:00,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=5817, Unknown=0, NotChecked=0, Total=6320 [2022-11-18 18:53:00,423 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 80 states, 79 states have (on average 3.6962025316455698) internal successors, (292), 80 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) [2022-11-18 18:53:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:04,607 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2022-11-18 18:53:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 18:53:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 3.6962025316455698) internal successors, (292), 80 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) Word has length 98 [2022-11-18 18:53:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:04,608 INFO L225 Difference]: With dead ends: 105 [2022-11-18 18:53:04,609 INFO L226 Difference]: Without dead ends: 105 [2022-11-18 18:53:04,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1622, Invalid=9298, Unknown=0, NotChecked=0, Total=10920 [2022-11-18 18:53:04,610 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 507 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:04,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 782 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-18 18:53:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-18 18:53:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-11-18 18:53:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-11-18 18:53:04,614 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-11-18 18:53:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:04,614 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-11-18 18:53:04,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 3.6962025316455698) internal successors, (292), 80 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) [2022-11-18 18:53:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-11-18 18:53:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-18 18:53:04,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:04,616 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:04,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 18:53:04,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:53:04,823 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:53:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1027630898, now seen corresponding path program 20 times [2022-11-18 18:53:04,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:04,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56056840] [2022-11-18 18:53:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:04,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 243 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:06,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56056840] [2022-11-18 18:53:06,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56056840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:53:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307474655] [2022-11-18 18:53:06,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:53:06,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:53:06,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:53:06,890 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:53:06,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 18:53:07,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:07,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-18 18:53:07,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:07,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:53:08,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:53:08,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:08,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:08,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:08,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:09,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:09,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:09,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:09,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:09,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:10,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:10,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:53:10,717 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:53:10,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:53:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 35 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:10,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:11,027 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1719 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1719) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-18 18:53:11,037 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1719 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1719) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2022-11-18 18:53:11,054 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1719 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1719) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2022-11-18 18:53:11,263 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1719 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1719) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2022-11-18 18:53:11,667 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1719 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1719) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)))) is different from false [2022-11-18 18:53:11,688 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1719 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1719) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2022-11-18 18:53:11,704 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1719 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1719) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2022-11-18 18:53:12,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:53:12,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:53:12,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:53:12,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:53:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 35 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 208 not checked. [2022-11-18 18:53:12,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307474655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:12,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:53:12,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 75 [2022-11-18 18:53:12,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226986401] [2022-11-18 18:53:12,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:12,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-18 18:53:12,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-18 18:53:12,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=4216, Unknown=133, NotChecked=966, Total=5550 [2022-11-18 18:53:12,774 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 75 states, 75 states have (on average 3.3466666666666667) internal successors, (251), 75 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:18,907 INFO L93 Difference]: Finished difference Result 159 states and 160 transitions. [2022-11-18 18:53:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 18:53:18,908 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.3466666666666667) internal successors, (251), 75 states have internal predecessors, (251), 0 states have call successors, (0), 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 102 [2022-11-18 18:53:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:18,908 INFO L225 Difference]: With dead ends: 159 [2022-11-18 18:53:18,908 INFO L226 Difference]: Without dead ends: 110 [2022-11-18 18:53:18,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 7 IntricatePredicates, 2 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=657, Invalid=10576, Unknown=137, NotChecked=1512, Total=12882 [2022-11-18 18:53:18,910 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 110 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 991 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:18,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1249 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1002 Invalid, 0 Unknown, 991 Unchecked, 0.9s Time] [2022-11-18 18:53:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-18 18:53:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-11-18 18:53:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-11-18 18:53:18,921 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2022-11-18 18:53:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:18,921 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-11-18 18:53:18,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.3466666666666667) internal successors, (251), 75 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-11-18 18:53:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-18 18:53:18,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:18,923 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:18,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 18:53:19,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:53:19,127 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:53:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1855124081, now seen corresponding path program 21 times [2022-11-18 18:53:19,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:19,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355501373] [2022-11-18 18:53:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:19,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 190 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:21,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:21,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355501373] [2022-11-18 18:53:21,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355501373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:53:21,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143383841] [2022-11-18 18:53:21,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:53:21,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:53:21,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:53:21,203 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:53:21,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 18:53:24,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-18 18:53:24,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-18 18:53:24,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:24,394 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:53:24,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:53:24,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:53:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 231 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:27,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:30,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:53:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 276 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:30,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143383841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:30,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:53:30,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2022-11-18 18:53:30,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941025531] [2022-11-18 18:53:30,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:30,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-18 18:53:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-18 18:53:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=6627, Unknown=0, NotChecked=0, Total=7310 [2022-11-18 18:53:30,711 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 86 states, 85 states have (on average 3.7176470588235295) internal successors, (316), 86 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:35,248 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2022-11-18 18:53:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 18:53:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 3.7176470588235295) internal successors, (316), 86 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-11-18 18:53:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:35,249 INFO L225 Difference]: With dead ends: 113 [2022-11-18 18:53:35,249 INFO L226 Difference]: Without dead ends: 113 [2022-11-18 18:53:35,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2078, Invalid=10578, Unknown=0, NotChecked=0, Total=12656 [2022-11-18 18:53:35,251 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 581 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:35,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 598 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 18:53:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-18 18:53:35,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-11-18 18:53:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-11-18 18:53:35,255 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2022-11-18 18:53:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:35,255 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-11-18 18:53:35,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 3.7176470588235295) internal successors, (316), 86 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-11-18 18:53:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-18 18:53:35,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:35,257 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:35,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-18 18:53:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-18 18:53:35,466 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:53:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -772087084, now seen corresponding path program 22 times [2022-11-18 18:53:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:35,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372602121] [2022-11-18 18:53:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 289 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:37,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:37,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372602121] [2022-11-18 18:53:37,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372602121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:53:37,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75738627] [2022-11-18 18:53:37,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:53:37,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:53:37,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:53:37,710 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:53:37,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 18:53:39,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:53:39,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 159 conjunts are in the unsatisfiable core [2022-11-18 18:53:39,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:40,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:53:40,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:40,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:41,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:41,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:41,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:41,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:41,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:41,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:41,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:41,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:41,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:42,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:42,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:42,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:42,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:42,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:42,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:43,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:53:43,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-18 18:53:43,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:53:43,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:53:43,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:53:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 38 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:43,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:52,346 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~to#1.offset_312| Int) (|v_ULTIMATE.start_cstrcpy_~to#1.offset_301| Int) (|ULTIMATE.start_cstrcpy_~to#1.base| Int) (v_ArrVal_1950 Int) (v_ArrVal_1972 Int)) (or (< |c_ULTIMATE.start_main_~nondetArea~0#1.offset| |v_ULTIMATE.start_cstrcpy_~to#1.offset_312|) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrcpy_~to#1.base| (store (store (select |c_#memory_int| |ULTIMATE.start_cstrcpy_~to#1.base|) |v_ULTIMATE.start_cstrcpy_~to#1.offset_312| v_ArrVal_1950) |v_ULTIMATE.start_cstrcpy_~to#1.offset_301| v_ArrVal_1972)) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0) (< (+ 11 |v_ULTIMATE.start_cstrcpy_~to#1.offset_312|) |v_ULTIMATE.start_cstrcpy_~to#1.offset_301|))) is different from false [2022-11-18 18:53:52,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1210 treesize of output 1162 [2022-11-18 18:53:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 38 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:55,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75738627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:55,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:53:55,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 34] total 94 [2022-11-18 18:53:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109952080] [2022-11-18 18:53:55,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:55,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-18 18:53:55,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-18 18:53:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=8250, Unknown=1, NotChecked=182, Total=8742 [2022-11-18 18:53:55,930 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 94 states, 94 states have (on average 3.3617021276595747) internal successors, (316), 94 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:06,487 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2022-11-18 18:54:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:54:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.3617021276595747) internal successors, (316), 94 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-11-18 18:54:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:06,489 INFO L225 Difference]: With dead ends: 171 [2022-11-18 18:54:06,489 INFO L226 Difference]: Without dead ends: 118 [2022-11-18 18:54:06,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 160 SyntacticMatches, 10 SemanticMatches, 134 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3252 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=818, Invalid=17275, Unknown=1, NotChecked=266, Total=18360 [2022-11-18 18:54:06,492 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 116 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 860 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:06,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1743 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1492 Invalid, 0 Unknown, 860 Unchecked, 1.2s Time] [2022-11-18 18:54:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-18 18:54:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-11-18 18:54:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-11-18 18:54:06,496 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2022-11-18 18:54:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:06,497 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-11-18 18:54:06,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.3617021276595747) internal successors, (316), 94 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-11-18 18:54:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-18 18:54:06,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:06,499 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:06,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-18 18:54:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:54:06,709 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:54:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1996348465, now seen corresponding path program 23 times [2022-11-18 18:54:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:54:06,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354662611] [2022-11-18 18:54:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:54:06,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:54:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:54:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 231 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:08,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:54:08,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354662611] [2022-11-18 18:54:08,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354662611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:54:08,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509123489] [2022-11-18 18:54:08,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:54:08,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:54:08,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:54:08,756 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:54:08,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 18:54:15,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-18 18:54:15,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-18 18:54:15,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:54:15,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-18 18:54:15,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:54:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 276 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:19,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:24,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:54:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 325 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:24,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509123489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:24,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:54:24,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 90 [2022-11-18 18:54:24,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992302317] [2022-11-18 18:54:24,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:24,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-18 18:54:24,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:54:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-18 18:54:24,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=7345, Unknown=0, NotChecked=0, Total=8190 [2022-11-18 18:54:24,506 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 91 states, 90 states have (on average 3.7777777777777777) internal successors, (340), 91 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:29,856 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-11-18 18:54:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 18:54:29,856 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 3.7777777777777777) internal successors, (340), 91 states have internal predecessors, (340), 0 states have call successors, (0), 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 114 [2022-11-18 18:54:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:29,857 INFO L225 Difference]: With dead ends: 121 [2022-11-18 18:54:29,857 INFO L226 Difference]: Without dead ends: 121 [2022-11-18 18:54:29,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2333, Invalid=11947, Unknown=0, NotChecked=0, Total=14280 [2022-11-18 18:54:29,858 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 641 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:29,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 761 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-18 18:54:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-18 18:54:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-11-18 18:54:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-11-18 18:54:29,862 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2022-11-18 18:54:29,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:29,863 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-11-18 18:54:29,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 3.7777777777777777) internal successors, (340), 91 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-11-18 18:54:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-18 18:54:29,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:29,864 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:29,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-18 18:54:30,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:54:30,071 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:54:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:30,072 INFO L85 PathProgramCache]: Analyzing trace with hash -815820682, now seen corresponding path program 24 times [2022-11-18 18:54:30,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:54:30,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559624975] [2022-11-18 18:54:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:54:30,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:54:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:54:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 339 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:32,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:54:32,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559624975] [2022-11-18 18:54:32,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559624975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:54:32,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661102929] [2022-11-18 18:54:32,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:54:32,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:54:32,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:54:32,798 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:54:32,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 18:54:47,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-18 18:54:47,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:54:48,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 189 conjunts are in the unsatisfiable core [2022-11-18 18:54:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:48,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:54:49,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:54:50,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:50,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:50,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:50,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:51,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:51,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:51,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:51,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:51,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:52,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:52,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:52,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:52,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:54:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:54:53,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:54:53,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-18 18:54:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 41 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:53,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:53,426 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2232 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2232) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-18 18:54:54,584 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2232 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2232) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~from#1.offset|)) 0)) is different from false [2022-11-18 18:54:54,599 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2232 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2232) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2022-11-18 18:54:54,873 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2232 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2232) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2022-11-18 18:54:55,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:54:55,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:54:55,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:54:55,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:54:55,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-18 18:54:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 41 proven. 515 refuted. 0 times theorem prover too weak. 0 trivial. 161 not checked. [2022-11-18 18:54:58,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661102929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:58,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:54:58,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 35] total 98 [2022-11-18 18:54:58,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700625875] [2022-11-18 18:54:58,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:58,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-18 18:54:58,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:54:58,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-18 18:54:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=8234, Unknown=200, NotChecked=748, Total=9506 [2022-11-18 18:54:58,484 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 98 states, 98 states have (on average 3.4693877551020407) internal successors, (340), 98 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:55:08,069 INFO L93 Difference]: Finished difference Result 183 states and 184 transitions. [2022-11-18 18:55:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-18 18:55:08,070 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.4693877551020407) internal successors, (340), 98 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-11-18 18:55:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:55:08,071 INFO L225 Difference]: With dead ends: 183 [2022-11-18 18:55:08,071 INFO L226 Difference]: Without dead ends: 126 [2022-11-18 18:55:08,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=869, Invalid=17847, Unknown=206, NotChecked=1100, Total=20022 [2022-11-18 18:55:08,074 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 121 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1044 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:55:08,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1890 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1833 Invalid, 0 Unknown, 1044 Unchecked, 1.4s Time] [2022-11-18 18:55:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-18 18:55:08,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-11-18 18:55:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-11-18 18:55:08,078 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2022-11-18 18:55:08,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:55:08,078 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-11-18 18:55:08,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.4693877551020407) internal successors, (340), 98 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-11-18 18:55:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-18 18:55:08,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:55:08,080 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:55:08,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-18 18:55:08,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-18 18:55:08,287 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:55:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:55:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1086989101, now seen corresponding path program 25 times [2022-11-18 18:55:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:55:08,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443179307] [2022-11-18 18:55:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:55:08,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:55:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:55:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 276 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:10,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:55:10,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443179307] [2022-11-18 18:55:10,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443179307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:55:10,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662698106] [2022-11-18 18:55:10,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:55:10,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:55:10,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:55:10,701 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:55:10,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 18:55:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:55:11,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-18 18:55:11,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:11,234 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:55:11,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:55:11,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:55:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 325 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:15,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:55:19,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:55:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 378 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:19,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662698106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:55:19,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:55:19,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2022-11-18 18:55:19,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932218571] [2022-11-18 18:55:19,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:55:19,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-18 18:55:19,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:55:19,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-18 18:55:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=8772, Unknown=0, NotChecked=0, Total=9506 [2022-11-18 18:55:19,576 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 98 states, 97 states have (on average 3.752577319587629) internal successors, (364), 98 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:55:26,214 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2022-11-18 18:55:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 18:55:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 3.752577319587629) internal successors, (364), 98 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-11-18 18:55:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:55:26,216 INFO L225 Difference]: With dead ends: 129 [2022-11-18 18:55:26,216 INFO L226 Difference]: Without dead ends: 129 [2022-11-18 18:55:26,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3593 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2423, Invalid=14089, Unknown=0, NotChecked=0, Total=16512 [2022-11-18 18:55:26,218 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 729 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 3365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:55:26,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1142 Invalid, 3365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3353 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 18:55:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-18 18:55:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-11-18 18:55:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-11-18 18:55:26,222 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2022-11-18 18:55:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:55:26,222 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-11-18 18:55:26,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 3.752577319587629) internal successors, (364), 98 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:26,223 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-11-18 18:55:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-18 18:55:26,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:55:26,224 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:55:26,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 18:55:26,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:55:26,424 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:55:26,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:55:26,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1149399064, now seen corresponding path program 26 times [2022-11-18 18:55:26,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:55:26,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945866259] [2022-11-18 18:55:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:55:26,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:55:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:55:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 393 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:29,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:55:29,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945866259] [2022-11-18 18:55:29,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945866259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:55:29,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720312067] [2022-11-18 18:55:29,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:55:29,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:55:29,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:55:29,455 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:55:29,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 18:55:29,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:55:29,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:55:29,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 158 conjunts are in the unsatisfiable core [2022-11-18 18:55:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:29,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:55:31,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:55:31,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:31,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:32,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:32,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:32,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:32,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:32,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:33,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:33,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:33,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:33,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:34,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:34,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:34,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:55:35,068 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:55:35,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:55:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 44 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:35,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:55:35,901 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2022-11-18 18:55:35,922 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2022-11-18 18:55:35,943 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2022-11-18 18:55:36,527 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2022-11-18 18:55:36,546 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2022-11-18 18:55:36,845 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2022-11-18 18:55:36,864 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2022-11-18 18:55:36,884 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2022-11-18 18:55:36,904 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 14)) 0)) is different from false [2022-11-18 18:55:37,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:55:37,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:55:37,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:55:37,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:55:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 44 proven. 433 refuted. 0 times theorem prover too weak. 0 trivial. 351 not checked. [2022-11-18 18:55:37,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720312067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:55:37,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:55:37,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 90 [2022-11-18 18:55:37,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758412255] [2022-11-18 18:55:37,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:55:37,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-18 18:55:37,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:55:37,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-18 18:55:37,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=5991, Unknown=220, NotChecked=1494, Total=8010 [2022-11-18 18:55:37,984 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 90 states, 90 states have (on average 3.4555555555555557) internal successors, (311), 90 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:55:47,715 INFO L93 Difference]: Finished difference Result 195 states and 196 transitions. [2022-11-18 18:55:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-18 18:55:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.4555555555555557) internal successors, (311), 90 states have internal predecessors, (311), 0 states have call successors, (0), 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 126 [2022-11-18 18:55:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:55:47,717 INFO L225 Difference]: With dead ends: 195 [2022-11-18 18:55:47,718 INFO L226 Difference]: Without dead ends: 134 [2022-11-18 18:55:47,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 9 IntricatePredicates, 2 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=894, Invalid=15433, Unknown=221, NotChecked=2358, Total=18906 [2022-11-18 18:55:47,720 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 128 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1448 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:55:47,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1806 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1684 Invalid, 0 Unknown, 1448 Unchecked, 1.3s Time] [2022-11-18 18:55:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-18 18:55:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2022-11-18 18:55:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-11-18 18:55:47,724 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2022-11-18 18:55:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:55:47,725 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-11-18 18:55:47,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.4555555555555557) internal successors, (311), 90 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:55:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-11-18 18:55:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-18 18:55:47,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:55:47,726 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:55:47,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-18 18:55:47,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:55:47,935 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:55:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:55:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash 740888437, now seen corresponding path program 27 times [2022-11-18 18:55:47,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:55:47,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893792282] [2022-11-18 18:55:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:55:47,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:55:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:55:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 325 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:50,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:55:50,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893792282] [2022-11-18 18:55:50,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893792282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:55:50,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163126788] [2022-11-18 18:55:50,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:55:50,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:55:50,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:55:50,466 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:55:50,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 18:55:55,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-18 18:55:55,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:55:55,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-18 18:55:55,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:55,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:55:55,451 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 [2022-11-18 18:55:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 378 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:59,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:03,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:56:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 435 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:04,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163126788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:04,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:56:04,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2022-11-18 18:56:04,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198253196] [2022-11-18 18:56:04,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:04,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-18 18:56:04,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:56:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-18 18:56:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1001, Invalid=9711, Unknown=0, NotChecked=0, Total=10712 [2022-11-18 18:56:04,091 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 104 states, 103 states have (on average 3.766990291262136) internal successors, (388), 104 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:10,113 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2022-11-18 18:56:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 18:56:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 3.766990291262136) internal successors, (388), 104 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-18 18:56:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:10,115 INFO L225 Difference]: With dead ends: 137 [2022-11-18 18:56:10,115 INFO L226 Difference]: Without dead ends: 137 [2022-11-18 18:56:10,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3930 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3053, Invalid=15579, Unknown=0, NotChecked=0, Total=18632 [2022-11-18 18:56:10,117 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 714 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:10,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 824 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-18 18:56:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-18 18:56:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-11-18 18:56:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-11-18 18:56:10,122 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2022-11-18 18:56:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:10,123 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-11-18 18:56:10,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 3.766990291262136) internal successors, (388), 104 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-11-18 18:56:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 18:56:10,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:10,124 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:10,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:10,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-18 18:56:10,325 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:56:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:10,325 INFO L85 PathProgramCache]: Analyzing trace with hash -914914886, now seen corresponding path program 28 times [2022-11-18 18:56:10,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:56:10,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939910605] [2022-11-18 18:56:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:56:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 451 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:13,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:56:13,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939910605] [2022-11-18 18:56:13,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939910605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:56:13,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286741748] [2022-11-18 18:56:13,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:56:13,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:56:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:56:13,609 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:56:13,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 18:56:15,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:56:15,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:15,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 167 conjunts are in the unsatisfiable core [2022-11-18 18:56:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:15,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:56:17,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:56:17,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:17,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:18,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:18,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:18,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:18,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:18,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:19,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:19,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:19,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:19,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:20,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:20,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:20,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:21,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:56:21,522 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:56:21,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:56:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 47 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:21,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:21,931 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2803) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-18 18:56:21,940 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2803) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2022-11-18 18:56:21,956 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2803) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2022-11-18 18:56:21,972 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2803) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2022-11-18 18:56:21,988 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2803) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2022-11-18 18:56:22,994 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2803) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2022-11-18 18:56:23,016 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2803) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2022-11-18 18:56:23,035 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2803) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2022-11-18 18:56:23,054 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2803) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2022-11-18 18:56:23,579 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2803) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 15 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-18 18:56:23,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:56:23,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:56:23,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:56:23,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:56:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 47 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 374 not checked. [2022-11-18 18:56:24,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286741748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:24,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:56:24,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 95 [2022-11-18 18:56:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896022453] [2022-11-18 18:56:24,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:24,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-18 18:56:24,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:56:24,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-18 18:56:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=6623, Unknown=227, NotChecked=1750, Total=8930 [2022-11-18 18:56:24,414 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 95 states, 95 states have (on average 3.4842105263157896) internal successors, (331), 95 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:35,536 INFO L93 Difference]: Finished difference Result 207 states and 208 transitions. [2022-11-18 18:56:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 18:56:35,537 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.4842105263157896) internal successors, (331), 95 states have internal predecessors, (331), 0 states have call successors, (0), 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 134 [2022-11-18 18:56:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:35,538 INFO L225 Difference]: With dead ends: 207 [2022-11-18 18:56:35,538 INFO L226 Difference]: Without dead ends: 142 [2022-11-18 18:56:35,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 10 IntricatePredicates, 2 DeprecatedPredicates, 3146 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=980, Invalid=17193, Unknown=227, NotChecked=2770, Total=21170 [2022-11-18 18:56:35,539 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 142 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1548 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:35,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1986 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1807 Invalid, 0 Unknown, 1548 Unchecked, 1.5s Time] [2022-11-18 18:56:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-18 18:56:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-11-18 18:56:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-11-18 18:56:35,544 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2022-11-18 18:56:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:35,544 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-11-18 18:56:35,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.4842105263157896) internal successors, (331), 95 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-11-18 18:56:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-18 18:56:35,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:35,546 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:35,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-18 18:56:35,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-18 18:56:35,756 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:56:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:35,757 INFO L85 PathProgramCache]: Analyzing trace with hash 149648407, now seen corresponding path program 29 times [2022-11-18 18:56:35,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:56:35,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742111313] [2022-11-18 18:56:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:35,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:56:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 378 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:38,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:56:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742111313] [2022-11-18 18:56:38,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742111313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:56:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449861621] [2022-11-18 18:56:38,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:56:38,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:56:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:56:38,652 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:56:38,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 18:56:41,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-11-18 18:56:41,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:41,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-18 18:56:41,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:41,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:56:41,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-18 18:56:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 435 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:49,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:55,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:56:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 496 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:55,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449861621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:55,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:56:55,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 37] total 108 [2022-11-18 18:56:55,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679914907] [2022-11-18 18:56:55,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:55,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-11-18 18:56:55,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:56:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-11-18 18:56:55,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=10570, Unknown=0, NotChecked=0, Total=11772 [2022-11-18 18:56:55,306 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 109 states, 108 states have (on average 3.814814814814815) internal successors, (412), 109 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:03,359 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2022-11-18 18:57:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 18:57:03,359 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 3.814814814814815) internal successors, (412), 109 states have internal predecessors, (412), 0 states have call successors, (0), 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 138 [2022-11-18 18:57:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:03,360 INFO L225 Difference]: With dead ends: 145 [2022-11-18 18:57:03,361 INFO L226 Difference]: Without dead ends: 145 [2022-11-18 18:57:03,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4716 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=3339, Invalid=17253, Unknown=0, NotChecked=0, Total=20592 [2022-11-18 18:57:03,362 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 830 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 3382 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 3410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:03,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1147 Invalid, 3410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3382 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-18 18:57:03,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-18 18:57:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2022-11-18 18:57:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2022-11-18 18:57:03,367 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 138 [2022-11-18 18:57:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:03,367 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2022-11-18 18:57:03,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 3.814814814814815) internal successors, (412), 109 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2022-11-18 18:57:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-18 18:57:03,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:03,369 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:03,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:03,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:57:03,579 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:57:03,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:03,580 INFO L85 PathProgramCache]: Analyzing trace with hash -11352740, now seen corresponding path program 30 times [2022-11-18 18:57:03,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:57:03,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741782374] [2022-11-18 18:57:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:03,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:57:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 513 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:06,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:57:06,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741782374] [2022-11-18 18:57:06,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741782374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:57:06,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236748268] [2022-11-18 18:57:06,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:57:06,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:57:06,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:57:06,988 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:57:06,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 18:57:47,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-11-18 18:57:47,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 221 conjunts are in the unsatisfiable core [2022-11-18 18:57:47,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:47,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:57:50,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:57:50,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:51,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:51,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:51,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:51,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:52,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:52,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:52,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:52,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:53,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:53,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:53,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:53,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:54,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:54,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:54,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:57:55,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:57:55,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:57:55,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-18 18:57:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 50 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:55,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:55,671 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3114) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2022-11-18 18:57:55,938 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3114) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2022-11-18 18:57:56,748 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3114) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2022-11-18 18:57:57,267 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3114) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2022-11-18 18:57:57,283 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3114) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2022-11-18 18:57:57,560 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3114) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 14)) 0)) is different from false [2022-11-18 18:57:57,835 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3114) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 16)) 0)) is different from false [2022-11-18 18:57:58,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:57:58,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:57:58,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:57:58,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:57:58,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-18 18:58:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 50 proven. 667 refuted. 0 times theorem prover too weak. 0 trivial. 357 not checked. [2022-11-18 18:58:01,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236748268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:01,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:58:01,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 41] total 116 [2022-11-18 18:58:01,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821013703] [2022-11-18 18:58:01,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:01,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-18 18:58:01,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:58:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-18 18:58:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=11147, Unknown=246, NotChecked=1540, Total=13340 [2022-11-18 18:58:01,874 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 116 states, 116 states have (on average 3.5517241379310347) internal successors, (412), 116 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:16,322 INFO L93 Difference]: Finished difference Result 219 states and 220 transitions. [2022-11-18 18:58:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-18 18:58:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.5517241379310347) internal successors, (412), 116 states have internal predecessors, (412), 0 states have call successors, (0), 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 142 [2022-11-18 18:58:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:16,324 INFO L225 Difference]: With dead ends: 219 [2022-11-18 18:58:16,324 INFO L226 Difference]: Without dead ends: 150 [2022-11-18 18:58:16,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 4046 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=1136, Invalid=24727, Unknown=247, NotChecked=2282, Total=28392 [2022-11-18 18:58:16,327 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 144 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 4350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1621 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:16,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 2858 Invalid, 4350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2680 Invalid, 0 Unknown, 1621 Unchecked, 2.1s Time] [2022-11-18 18:58:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-18 18:58:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-11-18 18:58:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-11-18 18:58:16,332 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142 [2022-11-18 18:58:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:16,332 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-11-18 18:58:16,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.5517241379310347) internal successors, (412), 116 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-11-18 18:58:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-18 18:58:16,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:16,334 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:16,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:16,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-11-18 18:58:16,547 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:58:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1450112327, now seen corresponding path program 31 times [2022-11-18 18:58:16,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:58:16,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960812621] [2022-11-18 18:58:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:58:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:58:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:58:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 435 proven. 704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:19,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:58:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960812621] [2022-11-18 18:58:19,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960812621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:58:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981713380] [2022-11-18 18:58:19,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:58:19,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:58:19,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:58:19,589 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:58:19,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-18 18:58:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:58:20,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-18 18:58:20,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:20,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:58:20,166 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 [2022-11-18 18:58:20,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:58:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 496 proven. 643 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:25,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:30,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:58:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 561 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:30,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981713380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:30,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:58:30,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 115 [2022-11-18 18:58:30,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460944950] [2022-11-18 18:58:30,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:30,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-18 18:58:30,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:58:30,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-18 18:58:30,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1010, Invalid=12330, Unknown=0, NotChecked=0, Total=13340 [2022-11-18 18:58:30,959 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 116 states, 115 states have (on average 3.791304347826087) internal successors, (436), 116 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:39,342 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2022-11-18 18:58:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 18:58:39,343 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 3.791304347826087) internal successors, (436), 116 states have internal predecessors, (436), 0 states have call successors, (0), 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 146 [2022-11-18 18:58:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:39,343 INFO L225 Difference]: With dead ends: 153 [2022-11-18 18:58:39,343 INFO L226 Difference]: Without dead ends: 153 [2022-11-18 18:58:39,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5177 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=3386, Invalid=19870, Unknown=0, NotChecked=0, Total=23256 [2022-11-18 18:58:39,345 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 951 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 4660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:39,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1575 Invalid, 4660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-18 18:58:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-18 18:58:39,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2022-11-18 18:58:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-11-18 18:58:39,349 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2022-11-18 18:58:39,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:39,350 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-11-18 18:58:39,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 3.791304347826087) internal successors, (436), 116 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-11-18 18:58:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-18 18:58:39,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:39,352 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:39,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:39,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:58:39,562 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:58:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash 271071998, now seen corresponding path program 32 times [2022-11-18 18:58:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:58:39,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745554492] [2022-11-18 18:58:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:58:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:58:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:58:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 579 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:43,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:58:43,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745554492] [2022-11-18 18:58:43,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745554492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:58:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144382007] [2022-11-18 18:58:43,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:58:43,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:58:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:58:43,337 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:58:43,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-18 18:58:43,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:58:43,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 183 conjunts are in the unsatisfiable core [2022-11-18 18:58:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:43,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:58:45,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:58:46,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:46,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:46,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:46,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:47,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:47,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:47,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:47,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:48,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:48,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:48,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:48,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:49,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:49,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:49,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:49,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:50,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:58:50,805 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:58:50,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 18:58:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 53 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:50,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:51,239 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-18 18:58:51,249 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2022-11-18 18:58:51,267 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2022-11-18 18:58:51,286 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2022-11-18 18:58:51,302 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2022-11-18 18:58:51,319 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2022-11-18 18:58:51,334 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~from#1.offset|)) 0)) is different from false [2022-11-18 18:58:51,349 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2022-11-18 18:58:51,365 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2022-11-18 18:58:51,648 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2022-11-18 18:58:51,664 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2022-11-18 18:58:51,680 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2022-11-18 18:58:51,695 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 14)) 0)) is different from false [2022-11-18 18:58:51,967 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 16)) 0)) is different from false [2022-11-18 18:58:51,984 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3442) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 17)) 0)) is different from false [2022-11-18 18:58:52,001 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3442 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_3442) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 17)) 0)) is different from false [2022-11-18 18:58:52,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:58:52,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 18:58:52,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:58:52,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 18:58:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 53 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 580 not checked. [2022-11-18 18:58:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144382007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:52,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:58:52,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 105 [2022-11-18 18:58:52,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100158945] [2022-11-18 18:58:52,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:52,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-18 18:58:52,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:58:52,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-18 18:58:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=7416, Unknown=101, NotChecked=3024, Total=10920 [2022-11-18 18:58:52,904 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 105 states, 105 states have (on average 3.533333333333333) internal successors, (371), 105 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:59:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:59:06,423 INFO L93 Difference]: Finished difference Result 231 states and 232 transitions. [2022-11-18 18:59:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 18:59:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.533333333333333) internal successors, (371), 105 states have internal predecessors, (371), 0 states have call successors, (0), 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 150 [2022-11-18 18:59:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:59:06,425 INFO L225 Difference]: With dead ends: 231 [2022-11-18 18:59:06,425 INFO L226 Difference]: Without dead ends: 158 [2022-11-18 18:59:06,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 250 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 16 IntricatePredicates, 2 DeprecatedPredicates, 3715 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=1155, Invalid=19977, Unknown=102, NotChecked=4848, Total=26082 [2022-11-18 18:59:06,427 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 159 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 2313 SdHoareTripleChecker+Invalid, 4716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2561 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:59:06,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 2313 Invalid, 4716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2100 Invalid, 0 Unknown, 2561 Unchecked, 1.7s Time] [2022-11-18 18:59:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-18 18:59:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2022-11-18 18:59:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:59:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-11-18 18:59:06,432 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150 [2022-11-18 18:59:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:59:06,432 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-11-18 18:59:06,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.533333333333333) internal successors, (371), 105 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:59:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-11-18 18:59:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-18 18:59:06,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:59:06,434 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:59:06,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-18 18:59:06,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:59:06,639 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:59:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:59:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash -349318309, now seen corresponding path program 33 times [2022-11-18 18:59:06,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:59:06,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611179309] [2022-11-18 18:59:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:59:06,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:59:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:59:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 496 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:59:11,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:59:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611179309] [2022-11-18 18:59:11,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611179309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:59:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74530475] [2022-11-18 18:59:11,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:59:11,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:59:11,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:59:11,075 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:59:11,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-18 18:59:29,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-18 18:59:29,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:59:29,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-18 18:59:29,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:59:29,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:59:29,701 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 [2022-11-18 18:59:29,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:59:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 561 proven. 717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:59:35,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:59:41,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:59:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 630 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:59:41,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74530475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:59:41,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:59:41,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 122 [2022-11-18 18:59:41,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831913995] [2022-11-18 18:59:41,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:59:41,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-18 18:59:41,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:59:41,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-18 18:59:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=13621, Unknown=0, NotChecked=0, Total=15006 [2022-11-18 18:59:41,467 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 123 states, 122 states have (on average 3.7704918032786887) internal successors, (460), 123 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:59:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:59:49,696 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2022-11-18 18:59:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 18:59:49,697 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 122 states have (on average 3.7704918032786887) internal successors, (460), 123 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-11-18 18:59:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:59:49,698 INFO L225 Difference]: With dead ends: 161 [2022-11-18 18:59:49,698 INFO L226 Difference]: Without dead ends: 161 [2022-11-18 18:59:49,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5687 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=4241, Invalid=21841, Unknown=0, NotChecked=0, Total=26082 [2022-11-18 18:59:49,700 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1333 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 3496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:59:49,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1333 Valid, 1170 Invalid, 3496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-18 18:59:49,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-18 18:59:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-11-18 18:59:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:59:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-11-18 18:59:49,704 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2022-11-18 18:59:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:59:49,704 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-11-18 18:59:49,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 122 states have (on average 3.7704918032786887) internal successors, (460), 123 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:59:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-11-18 18:59:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-18 18:59:49,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:59:49,706 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:59:49,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-18 18:59:49,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-18 18:59:49,921 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 18:59:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:59:49,922 INFO L85 PathProgramCache]: Analyzing trace with hash 789308064, now seen corresponding path program 34 times [2022-11-18 18:59:49,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:59:49,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583032181] [2022-11-18 18:59:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:59:49,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:59:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:59:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 649 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:59:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:59:53,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583032181] [2022-11-18 18:59:53,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583032181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:59:53,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891874150] [2022-11-18 18:59:53,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:59:53,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:59:53,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:59:53,715 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:59:53,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-18 18:59:56,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:59:56,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:59:56,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 194 conjunts are in the unsatisfiable core [2022-11-18 18:59:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:59:56,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:59:58,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 18:59:58,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:59:58,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:59:58,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:59:59,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:59:59,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:59:59,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 18:59:59,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:00,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:00,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:00,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:00,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:01,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:01,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:01,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:01,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:02,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:02,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:02,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 19:00:03,331 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 19:00:03,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 19:00:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 56 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:00:03,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:00:03,768 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-18 19:00:04,347 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2022-11-18 19:00:04,363 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2022-11-18 19:00:04,379 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2022-11-18 19:00:04,395 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~from#1.offset|)) 0)) is different from false [2022-11-18 19:00:04,967 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2022-11-18 19:00:04,983 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2022-11-18 19:00:05,276 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2022-11-18 19:00:05,578 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 15)) 0)) is different from false [2022-11-18 19:00:05,594 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 16)) 0)) is different from false [2022-11-18 19:00:05,610 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 17)) 0)) is different from false [2022-11-18 19:00:05,626 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3787) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 18)) 0)) is different from false [2022-11-18 19:00:05,642 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_3787) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 18 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-18 19:00:05,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:00:05,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 19:00:05,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:00:05,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 19:00:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 56 proven. 721 refuted. 0 times theorem prover too weak. 0 trivial. 575 not checked. [2022-11-18 19:00:06,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891874150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:00:06,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:00:06,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 110 [2022-11-18 19:00:06,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326235721] [2022-11-18 19:00:06,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:00:06,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-18 19:00:06,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:00:06,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-18 19:00:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=8685, Unknown=268, NotChecked=2626, Total=11990 [2022-11-18 19:00:06,577 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 110 states, 110 states have (on average 3.5545454545454547) internal successors, (391), 110 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:00:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:00:20,282 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2022-11-18 19:00:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-18 19:00:20,283 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.5545454545454547) internal successors, (391), 110 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-11-18 19:00:20,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:00:20,284 INFO L225 Difference]: With dead ends: 243 [2022-11-18 19:00:20,284 INFO L226 Difference]: Without dead ends: 166 [2022-11-18 19:00:20,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 168 ConstructedPredicates, 13 IntricatePredicates, 2 DeprecatedPredicates, 4223 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=1261, Invalid=23012, Unknown=271, NotChecked=4186, Total=28730 [2022-11-18 19:00:20,286 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 160 mSDsluCounter, 2655 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 2697 SdHoareTripleChecker+Invalid, 4614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2376 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:00:20,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 2697 Invalid, 4614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2183 Invalid, 0 Unknown, 2376 Unchecked, 1.6s Time] [2022-11-18 19:00:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-18 19:00:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2022-11-18 19:00:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:00:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-11-18 19:00:20,291 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2022-11-18 19:00:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:00:20,291 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-11-18 19:00:20,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.5545454545454547) internal successors, (391), 110 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:00:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-11-18 19:00:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-18 19:00:20,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:00:20,293 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:00:20,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-18 19:00:20,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:00:20,505 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 19:00:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:00:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1277833731, now seen corresponding path program 35 times [2022-11-18 19:00:20,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:00:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036871175] [2022-11-18 19:00:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:00:20,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:00:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:00:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 561 proven. 864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:00:24,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:00:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036871175] [2022-11-18 19:00:24,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036871175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:00:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212004040] [2022-11-18 19:00:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:00:24,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:00:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:00:24,005 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:00:24,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-18 19:00:30,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-18 19:00:30,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:00:30,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-18 19:00:30,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:00:30,817 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-11-18 19:00:30,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-18 19:00:30,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 19:00:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 630 proven. 795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:00:38,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:00:46,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:00:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 703 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:00:46,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212004040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:00:46,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:00:46,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 126 [2022-11-18 19:00:46,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020053123] [2022-11-18 19:00:46,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:00:46,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-11-18 19:00:46,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:00:46,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-11-18 19:00:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1806, Invalid=14196, Unknown=0, NotChecked=0, Total=16002 [2022-11-18 19:00:46,366 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 127 states, 126 states have (on average 3.8412698412698414) internal successors, (484), 127 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:00:55,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:00:55,501 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2022-11-18 19:00:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 19:00:55,502 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 3.8412698412698414) internal successors, (484), 127 states have internal predecessors, (484), 0 states have call successors, (0), 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 [2022-11-18 19:00:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:00:55,502 INFO L225 Difference]: With dead ends: 169 [2022-11-18 19:00:55,502 INFO L226 Difference]: Without dead ends: 169 [2022-11-18 19:00:55,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6683 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=4722, Invalid=23334, Unknown=0, NotChecked=0, Total=28056 [2022-11-18 19:00:55,504 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 647 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 4234 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:00:55,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1431 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4234 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-18 19:00:55,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-18 19:00:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2022-11-18 19:00:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:00:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-11-18 19:00:55,507 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 162 [2022-11-18 19:00:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:00:55,507 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-11-18 19:00:55,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 3.8412698412698414) internal successors, (484), 127 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:00:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-11-18 19:00:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-18 19:00:55,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:00:55,508 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:00:55,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-18 19:00:55,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:00:55,720 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-18 19:00:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:00:55,721 INFO L85 PathProgramCache]: Analyzing trace with hash 403815490, now seen corresponding path program 36 times [2022-11-18 19:00:55,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:00:55,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337591309] [2022-11-18 19:00:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:00:55,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:00:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:00:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 723 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:00:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:00:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337591309] [2022-11-18 19:00:59,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337591309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:00:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744839371] [2022-11-18 19:00:59,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:00:59,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:00:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:00:59,562 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:00:59,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19abb6f1-942d-49e7-80ad-640d2abb93b1/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-18 19:01:56,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-11-18 19:01:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:01:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 157 conjunts are in the unsatisfiable core [2022-11-18 19:01:56,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:01:56,424 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 19:01:56,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-18 19:01:56,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 19:02:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-11-18 19:02:03,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:02:09,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:02:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-11-18 19:02:09,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744839371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:02:09,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:02:09,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 27, 27] total 98 [2022-11-18 19:02:09,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857138615] [2022-11-18 19:02:09,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:02:09,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-18 19:02:09,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:02:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-18 19:02:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1075, Invalid=8431, Unknown=0, NotChecked=0, Total=9506 [2022-11-18 19:02:09,594 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 98 states, 98 states have (on average 3.5918367346938775) internal successors, (352), 98 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)