./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a --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 f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- 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-b5237d8 [2022-11-21 09:11:42,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:11:42,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:11:42,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:11:42,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:11:42,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:11:42,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:11:42,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:11:42,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:11:42,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:11:42,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:11:42,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:11:42,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:11:42,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:11:42,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:11:42,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:11:42,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:11:42,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:11:42,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:11:42,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:11:42,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:11:42,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:11:42,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:11:42,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:11:42,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:11:42,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:11:42,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:11:42,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:11:42,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:11:42,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:11:42,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:11:42,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:11:42,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:11:42,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:11:42,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:11:42,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:11:42,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:11:42,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:11:42,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:11:42,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:11:42,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:11:42,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 09:11:42,810 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:11:42,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:11:42,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:11:42,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:11:42,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:11:42,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:11:42,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:11:42,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:11:42,820 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:11:42,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:11:42,822 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:11:42,822 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 09:11:42,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:11:42,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:11:42,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:11:42,823 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 09:11:42,824 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 09:11:42,824 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 09:11:42,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:11:42,825 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 09:11:42,825 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:11:42,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:11:42,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:11:42,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:11:42,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:11:42,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:11:42,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:11:42,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:11:42,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:11:42,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 09:11:42,828 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_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2022-11-21 09:11:43,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:11:43,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:11:43,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:11:43,202 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:11:43,203 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:11:43,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2022-11-21 09:11:46,953 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:11:47,246 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:11:47,249 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2022-11-21 09:11:47,265 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/data/1d0b665a2/483e5b52309f4248adbf04b06a7e358f/FLAGed8e8c866 [2022-11-21 09:11:47,283 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/data/1d0b665a2/483e5b52309f4248adbf04b06a7e358f [2022-11-21 09:11:47,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:11:47,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:11:47,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:11:47,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:11:47,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:11:47,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e553174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47, skipping insertion in model container [2022-11-21 09:11:47,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:11:47,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:11:47,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:11:47,812 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:11:47,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:11:47,882 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:11:47,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47 WrapperNode [2022-11-21 09:11:47,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:11:47,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:11:47,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:11:47,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:11:47,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,947 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-21 09:11:47,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:11:47,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:11:47,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:11:47,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:11:47,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:47,995 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:48,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:48,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:11:48,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:11:48,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:11:48,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:11:48,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (1/1) ... [2022-11-21 09:11:48,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:11:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:11:48,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:11:48,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:11:48,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 09:11:48,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 09:11:48,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 09:11:48,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 09:11:48,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:11:48,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:11:48,267 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:11:48,277 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:11:48,540 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:11:48,548 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:11:48,561 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 09:11:48,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:11:48 BoogieIcfgContainer [2022-11-21 09:11:48,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:11:48,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:11:48,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:11:48,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:11:48,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:11:47" (1/3) ... [2022-11-21 09:11:48,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298ba77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:11:48, skipping insertion in model container [2022-11-21 09:11:48,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:11:47" (2/3) ... [2022-11-21 09:11:48,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298ba77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:11:48, skipping insertion in model container [2022-11-21 09:11:48,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:11:48" (3/3) ... [2022-11-21 09:11:48,589 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2022-11-21 09:11:48,628 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:11:48,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-21 09:11:48,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:11:48,734 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;@7adf9de4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:11:48,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-21 09:11:48,740 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) [2022-11-21 09:11:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 09:11:48,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:48,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 09:11:48,750 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)] === [2022-11-21 09:11:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2022-11-21 09:11:48,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:48,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994266231] [2022-11-21 09:11:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:48,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:49,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:49,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994266231] [2022-11-21 09:11:49,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994266231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:49,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:49,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 09:11:49,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393336041] [2022-11-21 09:11:49,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:49,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 09:11:49,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:49,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 09:11:49,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:11:49,166 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) [2022-11-21 09:11:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:49,231 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-11-21 09:11:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:11:49,234 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 [2022-11-21 09:11:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:49,242 INFO L225 Difference]: With dead ends: 34 [2022-11-21 09:11:49,242 INFO L226 Difference]: Without dead ends: 30 [2022-11-21 09:11:49,244 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 [2022-11-21 09:11:49,257 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 [2022-11-21 09:11:49,258 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] [2022-11-21 09:11:49,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-21 09:11:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-21 09:11:49,288 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) [2022-11-21 09:11:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-21 09:11:49,291 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2022-11-21 09:11:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:49,291 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-21 09:11:49,292 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) [2022-11-21 09:11:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-21 09:11:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 09:11:49,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:49,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 09:11:49,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 09:11:49,293 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)] === [2022-11-21 09:11:49,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2022-11-21 09:11:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:49,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497412627] [2022-11-21 09:11:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:49,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:49,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497412627] [2022-11-21 09:11:49,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497412627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:49,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:11:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340408156] [2022-11-21 09:11:49,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:11:49,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:11:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:11:49,333 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) [2022-11-21 09:11:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:49,361 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-21 09:11:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:11:49,362 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 [2022-11-21 09:11:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:49,363 INFO L225 Difference]: With dead ends: 29 [2022-11-21 09:11:49,363 INFO L226 Difference]: Without dead ends: 28 [2022-11-21 09:11:49,363 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 [2022-11-21 09:11:49,365 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 [2022-11-21 09:11:49,365 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] [2022-11-21 09:11:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-21 09:11:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-21 09:11:49,369 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) [2022-11-21 09:11:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-21 09:11:49,370 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2022-11-21 09:11:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:49,370 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-21 09:11:49,370 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) [2022-11-21 09:11:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-21 09:11:49,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 09:11:49,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:49,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:49,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 09:11:49,372 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)] === [2022-11-21 09:11:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2022-11-21 09:11:49,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:49,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123640946] [2022-11-21 09:11:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:49,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:49,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123640946] [2022-11-21 09:11:49,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123640946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:49,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:49,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 09:11:49,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570837195] [2022-11-21 09:11:49,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:49,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 09:11:49,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 09:11:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:11:49,561 INFO L87 Difference]: Start difference. First operand 27 states and 30 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) [2022-11-21 09:11:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:49,631 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-11-21 09:11:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:11:49,638 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 [2022-11-21 09:11:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:49,639 INFO L225 Difference]: With dead ends: 33 [2022-11-21 09:11:49,639 INFO L226 Difference]: Without dead ends: 33 [2022-11-21 09:11:49,640 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 [2022-11-21 09:11:49,644 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:49,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:11:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-21 09:11:49,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-11-21 09:11:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) 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) [2022-11-21 09:11:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-11-21 09:11:49,650 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 7 [2022-11-21 09:11:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:49,650 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-11-21 09:11:49,651 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) [2022-11-21 09:11:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-11-21 09:11:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 09:11:49,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:49,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:49,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 09:11:49,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033068, now seen corresponding path program 1 times [2022-11-21 09:11:49,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:49,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867434220] [2022-11-21 09:11:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:49,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:49,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:49,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867434220] [2022-11-21 09:11:49,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867434220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:49,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:49,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:11:49,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41079509] [2022-11-21 09:11:49,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:49,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:11:49,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:11:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:11:49,792 INFO L87 Difference]: Start difference. First operand 28 states and 31 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) [2022-11-21 09:11:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:49,829 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-21 09:11:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:11:49,830 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 [2022-11-21 09:11:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:49,831 INFO L225 Difference]: With dead ends: 26 [2022-11-21 09:11:49,831 INFO L226 Difference]: Without dead ends: 26 [2022-11-21 09:11:49,832 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 [2022-11-21 09:11:49,833 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:49,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:11:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-21 09:11:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-21 09:11:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5263157894736843) 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) [2022-11-21 09:11:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-21 09:11:49,839 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2022-11-21 09:11:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:49,840 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-21 09:11:49,840 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) [2022-11-21 09:11:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-21 09:11:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 09:11:49,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:49,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:49,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 09:11:49,842 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)] === [2022-11-21 09:11:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2022-11-21 09:11:49,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:49,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484169919] [2022-11-21 09:11:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:50,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:50,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484169919] [2022-11-21 09:11:50,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484169919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:50,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:50,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 09:11:50,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109547599] [2022-11-21 09:11:50,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:50,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:11:50,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:50,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:11:50,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:11:50,098 INFO L87 Difference]: Start difference. First operand 26 states and 29 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) [2022-11-21 09:11:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:50,194 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-11-21 09:11:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:11:50,196 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 [2022-11-21 09:11:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:50,197 INFO L225 Difference]: With dead ends: 51 [2022-11-21 09:11:50,199 INFO L226 Difference]: Without dead ends: 51 [2022-11-21 09:11:50,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:11:50,201 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:50,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 66 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:11:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-21 09:11:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2022-11-21 09:11:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 28 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) [2022-11-21 09:11:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-21 09:11:50,216 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 7 [2022-11-21 09:11:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:50,217 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-21 09:11:50,217 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) [2022-11-21 09:11:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-21 09:11:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 09:11:50,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:50,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:50,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 09:11:50,219 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092651, now seen corresponding path program 1 times [2022-11-21 09:11:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:50,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011324692] [2022-11-21 09:11:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:50,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:50,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:50,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011324692] [2022-11-21 09:11:50,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011324692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:50,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:50,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:11:50,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235171488] [2022-11-21 09:11:50,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 09:11:50,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:50,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 09:11:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 09:11:50,507 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:50,572 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-11-21 09:11:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 09:11:50,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 09:11:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:50,576 INFO L225 Difference]: With dead ends: 32 [2022-11-21 09:11:50,576 INFO L226 Difference]: Without dead ends: 32 [2022-11-21 09:11:50,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 09:11:50,583 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:50,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:11:50,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-21 09:11:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-21 09:11:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.5) 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) [2022-11-21 09:11:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-21 09:11:50,598 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 7 [2022-11-21 09:11:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:50,598 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-21 09:11:50,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-21 09:11:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 09:11:50,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:50,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:50,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 09:11:50,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1762264955, now seen corresponding path program 1 times [2022-11-21 09:11:50,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:50,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130029042] [2022-11-21 09:11:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:50,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:50,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:50,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130029042] [2022-11-21 09:11:50,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130029042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:11:50,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376801399] [2022-11-21 09:11:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:50,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:50,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:11:50,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:11:50,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 09:11:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:51,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 09:11:51,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:11:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:51,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:11:51,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-21 09:11:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:51,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376801399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:11:51,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:11:51,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-21 09:11:51,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231840670] [2022-11-21 09:11:51,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:11:51,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 09:11:51,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:51,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 09:11:51,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-21 09:11:51,495 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-11-21 09:11:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:51,781 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-11-21 09:11:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 09:11:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 09:11:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:51,783 INFO L225 Difference]: With dead ends: 48 [2022-11-21 09:11:51,783 INFO L226 Difference]: Without dead ends: 48 [2022-11-21 09:11:51,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-21 09:11:51,784 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:51,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 102 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:11:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-21 09:11:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-11-21 09:11:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-21 09:11:51,789 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2022-11-21 09:11:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:51,790 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-21 09:11:51,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-11-21 09:11:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-21 09:11:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 09:11:51,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:51,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:51,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 09:11:51,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:51,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:51,999 INFO L85 PathProgramCache]: Analyzing trace with hash 952918329, now seen corresponding path program 1 times [2022-11-21 09:11:52,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:52,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841321945] [2022-11-21 09:11:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:52,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:52,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:52,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841321945] [2022-11-21 09:11:52,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841321945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:11:52,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446230561] [2022-11-21 09:11:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:52,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:52,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:11:52,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:11:52,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 09:11:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:52,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 09:11:52,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:11:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:52,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:11:52,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-21 09:11:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:52,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446230561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:11:52,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:11:52,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-21 09:11:52,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025970226] [2022-11-21 09:11:52,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:11:52,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 09:11:52,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:52,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 09:11:52,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-21 09:11:52,695 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:53,006 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-11-21 09:11:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 09:11:53,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 09:11:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:53,008 INFO L225 Difference]: With dead ends: 76 [2022-11-21 09:11:53,008 INFO L226 Difference]: Without dead ends: 76 [2022-11-21 09:11:53,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-21 09:11:53,009 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 173 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:53,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 109 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:11:53,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-21 09:11:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 35. [2022-11-21 09:11:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 34 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) [2022-11-21 09:11:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-21 09:11:53,015 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 11 [2022-11-21 09:11:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:53,016 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-21 09:11:53,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-21 09:11:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 09:11:53,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:53,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:53,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 09:11:53,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-21 09:11:53,224 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:53,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:53,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976699, now seen corresponding path program 1 times [2022-11-21 09:11:53,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:53,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807711415] [2022-11-21 09:11:53,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:53,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:53,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:53,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807711415] [2022-11-21 09:11:53,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807711415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:53,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:53,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 09:11:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953589104] [2022-11-21 09:11:53,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:11:53,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:11:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:11:53,400 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:53,470 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-11-21 09:11:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 09:11:53,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 09:11:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:53,471 INFO L225 Difference]: With dead ends: 34 [2022-11-21 09:11:53,471 INFO L226 Difference]: Without dead ends: 34 [2022-11-21 09:11:53,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:11:53,473 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:53,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 30 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:11:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-21 09:11:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-21 09:11:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-21 09:11:53,483 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-11-21 09:11:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:53,484 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-21 09:11:53,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-21 09:11:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 09:11:53,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:53,485 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:53,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 09:11:53,486 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:53,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2022-11-21 09:11:53,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:53,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119806074] [2022-11-21 09:11:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:53,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:53,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119806074] [2022-11-21 09:11:53,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119806074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:11:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959586235] [2022-11-21 09:11:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:53,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:53,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:11:53,777 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:11:53,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 09:11:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 09:11:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:11:53,913 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-21 09:11:53,913 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 [2022-11-21 09:11:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:54,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:11:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:54,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959586235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:11:54,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:11:54,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-21 09:11:54,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098724692] [2022-11-21 09:11:54,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:11:54,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 09:11:54,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:54,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 09:11:54,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-21 09:11:54,577 INFO L87 Difference]: Start difference. First operand 33 states and 38 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) [2022-11-21 09:11:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:54,828 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-21 09:11:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:11:54,829 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 [2022-11-21 09:11:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:54,830 INFO L225 Difference]: With dead ends: 37 [2022-11-21 09:11:54,830 INFO L226 Difference]: Without dead ends: 37 [2022-11-21 09:11:54,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-21 09:11:54,831 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:54,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 57 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:11:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-21 09:11:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-11-21 09:11:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-21 09:11:54,835 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2022-11-21 09:11:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:54,836 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-21 09:11:54,836 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) [2022-11-21 09:11:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-21 09:11:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 09:11:54,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:54,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:54,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 09:11:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:55,052 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506494, now seen corresponding path program 1 times [2022-11-21 09:11:55,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:55,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273047688] [2022-11-21 09:11:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:55,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:55,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:55,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273047688] [2022-11-21 09:11:55,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273047688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:55,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:55,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:11:55,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342203696] [2022-11-21 09:11:55,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:55,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 09:11:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:55,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 09:11:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:11:55,130 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:55,165 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-21 09:11:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:11:55,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 09:11:55,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:55,167 INFO L225 Difference]: With dead ends: 23 [2022-11-21 09:11:55,167 INFO L226 Difference]: Without dead ends: 23 [2022-11-21 09:11:55,167 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 [2022-11-21 09:11:55,168 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:55,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:11:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-21 09:11:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-21 09:11:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-21 09:11:55,176 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2022-11-21 09:11:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:55,176 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-21 09:11:55,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-21 09:11:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 09:11:55,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:55,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:55,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 09:11:55,178 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:55,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506495, now seen corresponding path program 1 times [2022-11-21 09:11:55,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:55,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692020521] [2022-11-21 09:11:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:55,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:55,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:55,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692020521] [2022-11-21 09:11:55,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692020521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:11:55,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24221931] [2022-11-21 09:11:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:55,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:11:55,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:11:55,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 09:11:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:55,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 09:11:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:11:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:55,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:11:55,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-21 09:11:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:55,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24221931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:11:55,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:11:55,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-11-21 09:11:55,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770493895] [2022-11-21 09:11:55,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:11:55,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 09:11:55,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 09:11:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-21 09:11:55,598 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:55,746 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-11-21 09:11:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:11:55,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 09:11:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:55,748 INFO L225 Difference]: With dead ends: 36 [2022-11-21 09:11:55,748 INFO L226 Difference]: Without dead ends: 36 [2022-11-21 09:11:55,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-21 09:11:55,749 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:55,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 61 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:11:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-21 09:11:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2022-11-21 09:11:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-21 09:11:55,752 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2022-11-21 09:11:55,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:55,752 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-21 09:11:55,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-21 09:11:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 09:11:55,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:55,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:55,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 09:11:55,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:55,957 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:55,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971629, now seen corresponding path program 1 times [2022-11-21 09:11:55,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:55,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437377769] [2022-11-21 09:11:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:55,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:56,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:56,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437377769] [2022-11-21 09:11:56,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437377769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:56,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:56,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 09:11:56,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520616913] [2022-11-21 09:11:56,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:56,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:11:56,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:11:56,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:11:56,117 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2022-11-21 09:11:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:56,153 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-21 09:11:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:11:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 [2022-11-21 09:11:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:56,154 INFO L225 Difference]: With dead ends: 23 [2022-11-21 09:11:56,154 INFO L226 Difference]: Without dead ends: 23 [2022-11-21 09:11:56,155 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 [2022-11-21 09:11:56,156 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:56,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:11:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-21 09:11:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-21 09:11:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-21 09:11:56,159 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-11-21 09:11:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:56,160 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-21 09:11:56,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2022-11-21 09:11:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-21 09:11:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 09:11:56,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:56,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:56,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 09:11:56,162 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971628, now seen corresponding path program 1 times [2022-11-21 09:11:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:56,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943109317] [2022-11-21 09:11:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 09:11:56,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:56,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943109317] [2022-11-21 09:11:56,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943109317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:56,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:56,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 09:11:56,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580656467] [2022-11-21 09:11:56,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:56,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:11:56,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:56,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:11:56,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:11:56,388 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2022-11-21 09:11:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:56,470 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-11-21 09:11:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 09:11:56,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 [2022-11-21 09:11:56,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:56,472 INFO L225 Difference]: With dead ends: 50 [2022-11-21 09:11:56,472 INFO L226 Difference]: Without dead ends: 50 [2022-11-21 09:11:56,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:11:56,473 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:56,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 68 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:11:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-21 09:11:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-11-21 09:11:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2580645161290323) 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) [2022-11-21 09:11:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-21 09:11:56,477 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2022-11-21 09:11:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:56,478 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-21 09:11:56,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2022-11-21 09:11:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-21 09:11:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 09:11:56,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:56,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:56,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 09:11:56,479 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1786806190, now seen corresponding path program 1 times [2022-11-21 09:11:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:56,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776315993] [2022-11-21 09:11:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 09:11:56,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:56,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776315993] [2022-11-21 09:11:56,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776315993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:56,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:11:56,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 09:11:56,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094899913] [2022-11-21 09:11:56,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:56,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:11:56,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:56,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:11:56,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:11:56,784 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 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) [2022-11-21 09:11:56,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:56,909 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-21 09:11:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:11:56,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 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 [2022-11-21 09:11:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:56,910 INFO L225 Difference]: With dead ends: 41 [2022-11-21 09:11:56,910 INFO L226 Difference]: Without dead ends: 41 [2022-11-21 09:11:56,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-21 09:11:56,911 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:56,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 28 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:11:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-21 09:11:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2022-11-21 09:11:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-21 09:11:56,915 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2022-11-21 09:11:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:56,915 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-21 09:11:56,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 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) [2022-11-21 09:11:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-21 09:11:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 09:11:56,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:56,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:56,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 09:11:56,917 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)] === [2022-11-21 09:11:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:56,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1933649190, now seen corresponding path program 1 times [2022-11-21 09:11:56,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:56,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896762632] [2022-11-21 09:11:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:56,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:57,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:57,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896762632] [2022-11-21 09:11:57,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896762632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:11:57,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117203225] [2022-11-21 09:11:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:57,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:57,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:11:57,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:11:57,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 09:11:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:57,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 09:11:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:11:57,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 09:11:57,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 09:11:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 09:11:57,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:11:57,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117203225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:57,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:11:57,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2022-11-21 09:11:57,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098826589] [2022-11-21 09:11:57,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:57,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:11:57,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:11:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-21 09:11:57,361 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:57,497 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-11-21 09:11:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:11:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-21 09:11:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:57,498 INFO L225 Difference]: With dead ends: 39 [2022-11-21 09:11:57,498 INFO L226 Difference]: Without dead ends: 39 [2022-11-21 09:11:57,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-21 09:11:57,499 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:57,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 75 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:11:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-21 09:11:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-11-21 09:11:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 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) [2022-11-21 09:11:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-21 09:11:57,502 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 17 [2022-11-21 09:11:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:57,503 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-21 09:11:57,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-21 09:11:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 09:11:57,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:57,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:57,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 09:11:57,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 09:11:57,711 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)] === [2022-11-21 09:11:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:57,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1350200856, now seen corresponding path program 1 times [2022-11-21 09:11:57,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:57,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299503491] [2022-11-21 09:11:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:57,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:58,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299503491] [2022-11-21 09:11:58,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299503491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:11:58,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74451945] [2022-11-21 09:11:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:58,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:58,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:11:58,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:11:58,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 09:11:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:58,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 09:11:58,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:11:58,277 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 [2022-11-21 09:11:58,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 09:11:58,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:11:58,425 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 [2022-11-21 09:11:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 09:11:58,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:11:58,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74451945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:11:58,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:11:58,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 12 [2022-11-21 09:11:58,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833356697] [2022-11-21 09:11:58,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:11:58,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 09:11:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:58,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 09:11:58,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-21 09:11:58,437 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:11:58,648 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-21 09:11:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 09:11:58,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-21 09:11:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:11:58,649 INFO L225 Difference]: With dead ends: 62 [2022-11-21 09:11:58,649 INFO L226 Difference]: Without dead ends: 62 [2022-11-21 09:11:58,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-21 09:11:58,650 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:11:58,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 93 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:11:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-21 09:11:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2022-11-21 09:11:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-21 09:11:58,654 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 17 [2022-11-21 09:11:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:11:58,655 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-21 09:11:58,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:11:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-21 09:11:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 09:11:58,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:11:58,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:11:58,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 09:11:58,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 09:11:58,864 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:11:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:11:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash 70337178, now seen corresponding path program 1 times [2022-11-21 09:11:58,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:11:58,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773167138] [2022-11-21 09:11:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:58,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:11:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:59,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:11:59,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773167138] [2022-11-21 09:11:59,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773167138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:11:59,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842196792] [2022-11-21 09:11:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:11:59,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:11:59,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:11:59,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:11:59,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 09:11:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:11:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 09:11:59,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:11:59,447 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 [2022-11-21 09:11:59,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 09:11:59,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:11:59,556 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 [2022-11-21 09:11:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:59,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:11:59,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-21 09:11:59,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-21 09:11:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:11:59,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842196792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:11:59,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:11:59,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-21 09:11:59,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259481190] [2022-11-21 09:11:59,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:11:59,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 09:11:59,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:11:59,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 09:11:59,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-11-21 09:11:59,923 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2022-11-21 09:12:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:00,342 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-11-21 09:12:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 09:12:00,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) Word has length 17 [2022-11-21 09:12:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:00,343 INFO L225 Difference]: With dead ends: 64 [2022-11-21 09:12:00,343 INFO L226 Difference]: Without dead ends: 64 [2022-11-21 09:12:00,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-11-21 09:12:00,344 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:00,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 168 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:12:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-21 09:12:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2022-11-21 09:12:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-21 09:12:00,348 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2022-11-21 09:12:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:00,348 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-21 09:12:00,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2022-11-21 09:12:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-21 09:12:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 09:12:00,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:00,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:00,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:00,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 09:12:00,550 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:00,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:00,551 INFO L85 PathProgramCache]: Analyzing trace with hash 186362076, now seen corresponding path program 1 times [2022-11-21 09:12:00,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:00,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466766692] [2022-11-21 09:12:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:00,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 09:12:00,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:00,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466766692] [2022-11-21 09:12:00,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466766692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:12:00,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:12:00,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:12:00,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963822465] [2022-11-21 09:12:00,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:12:00,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 09:12:00,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:00,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 09:12:00,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:12:00,731 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:00,752 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-21 09:12:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:12:00,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-21 09:12:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:00,753 INFO L225 Difference]: With dead ends: 39 [2022-11-21 09:12:00,753 INFO L226 Difference]: Without dead ends: 24 [2022-11-21 09:12:00,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:12:00,754 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:00,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:12:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-21 09:12:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-21 09:12:00,757 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) [2022-11-21 09:12:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-21 09:12:00,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2022-11-21 09:12:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:00,758 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-21 09:12:00,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-21 09:12:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 09:12:00,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:00,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:00,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 09:12:00,760 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2146020323, now seen corresponding path program 2 times [2022-11-21 09:12:00,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:00,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646081352] [2022-11-21 09:12:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:00,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:01,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:01,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646081352] [2022-11-21 09:12:01,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646081352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:01,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998120515] [2022-11-21 09:12:01,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:12:01,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:01,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:01,034 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:01,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 09:12:01,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:12:01,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:01,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 09:12:01,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:01,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:01,426 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 [2022-11-21 09:12:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:01,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998120515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:01,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:01,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-11-21 09:12:01,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884707657] [2022-11-21 09:12:01,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:01,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 09:12:01,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:01,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 09:12:01,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-21 09:12:01,483 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 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) [2022-11-21 09:12:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:01,689 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-11-21 09:12:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 09:12:01,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 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) Word has length 21 [2022-11-21 09:12:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:01,691 INFO L225 Difference]: With dead ends: 32 [2022-11-21 09:12:01,691 INFO L226 Difference]: Without dead ends: 32 [2022-11-21 09:12:01,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-11-21 09:12:01,692 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 129 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:01,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 47 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:12:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-21 09:12:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-21 09:12:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 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) [2022-11-21 09:12:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-21 09:12:01,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2022-11-21 09:12:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:01,694 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-21 09:12:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 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) [2022-11-21 09:12:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-21 09:12:01,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 09:12:01,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:01,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:01,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:01,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:01,904 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:01,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2102120586, now seen corresponding path program 1 times [2022-11-21 09:12:01,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:01,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416489199] [2022-11-21 09:12:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:02,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:02,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416489199] [2022-11-21 09:12:02,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416489199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:02,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899077344] [2022-11-21 09:12:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:02,256 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:02,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 09:12:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 09:12:02,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:02,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:12:02,444 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 [2022-11-21 09:12:02,450 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 [2022-11-21 09:12:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:02,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:03,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 09:12:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:03,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899077344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:03,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:03,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-11-21 09:12:03,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413958291] [2022-11-21 09:12:03,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:03,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 09:12:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:03,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 09:12:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-11-21 09:12:03,158 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:03,709 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-11-21 09:12:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 09:12:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-21 09:12:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:03,710 INFO L225 Difference]: With dead ends: 30 [2022-11-21 09:12:03,710 INFO L226 Difference]: Without dead ends: 30 [2022-11-21 09:12:03,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-11-21 09:12:03,711 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 175 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:03,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 43 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:12:03,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-21 09:12:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-21 09:12:03,713 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) [2022-11-21 09:12:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-11-21 09:12:03,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2022-11-21 09:12:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:03,714 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-11-21 09:12:03,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-11-21 09:12:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 09:12:03,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:03,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:03,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:03,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:03,916 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)] === [2022-11-21 09:12:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:03,917 INFO L85 PathProgramCache]: Analyzing trace with hash 643759544, now seen corresponding path program 3 times [2022-11-21 09:12:03,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:03,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847155055] [2022-11-21 09:12:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:03,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:04,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:04,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847155055] [2022-11-21 09:12:04,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847155055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:04,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624162275] [2022-11-21 09:12:04,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:12:04,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:04,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:04,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:04,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 09:12:04,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 09:12:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:04,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-21 09:12:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:04,807 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 [2022-11-21 09:12:05,041 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 [2022-11-21 09:12:05,188 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 [2022-11-21 09:12:05,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 09:12:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:05,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:05,444 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_301 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_301) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 1)) 0)) is different from false [2022-11-21 09:12:05,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:05,454 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 [2022-11-21 09:12:05,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:05,465 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 [2022-11-21 09:12:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:05,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624162275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:05,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:05,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-11-21 09:12:05,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529007605] [2022-11-21 09:12:05,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:05,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 09:12:05,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:05,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 09:12:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=468, Unknown=9, NotChecked=44, Total=600 [2022-11-21 09:12:05,730 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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) [2022-11-21 09:12:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:06,478 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-11-21 09:12:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 09:12:06,479 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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 [2022-11-21 09:12:06,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:06,479 INFO L225 Difference]: With dead ends: 44 [2022-11-21 09:12:06,479 INFO L226 Difference]: Without dead ends: 35 [2022-11-21 09:12:06,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=986, Unknown=9, NotChecked=66, Total=1260 [2022-11-21 09:12:06,481 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:06,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 107 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 188 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-11-21 09:12:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-21 09:12:06,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-11-21 09:12:06,483 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) [2022-11-21 09:12:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-11-21 09:12:06,484 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2022-11-21 09:12:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:06,484 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-11-21 09:12:06,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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) [2022-11-21 09:12:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-11-21 09:12:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 09:12:06,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:06,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:06,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:06,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:06,694 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:06,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1470618683, now seen corresponding path program 4 times [2022-11-21 09:12:06,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:06,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688833477] [2022-11-21 09:12:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:06,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:07,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688833477] [2022-11-21 09:12:07,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688833477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991850665] [2022-11-21 09:12:07,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:12:07,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:07,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:07,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:07,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 09:12:07,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:12:07,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:07,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 09:12:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:07,310 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 [2022-11-21 09:12:07,564 INFO L321 Elim1Store]: treesize reduction 39, result has 56.2 percent of original size [2022-11-21 09:12:07,564 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 [2022-11-21 09:12:08,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:08,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 135 [2022-11-21 09:12:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 09:12:09,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:16,517 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 179 treesize of output 173 [2022-11-21 09:12:16,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 155 [2022-11-21 09:12:16,986 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 [2022-11-21 09:12:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 09:12:17,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991850665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:17,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:17,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 33 [2022-11-21 09:12:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005704023] [2022-11-21 09:12:17,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:17,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:12:17,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:12:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=986, Unknown=1, NotChecked=0, Total=1122 [2022-11-21 09:12:17,021 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:20,863 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-11-21 09:12:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 09:12:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-21 09:12:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:20,865 INFO L225 Difference]: With dead ends: 45 [2022-11-21 09:12:20,865 INFO L226 Difference]: Without dead ends: 45 [2022-11-21 09:12:20,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=601, Invalid=2590, Unknown=1, NotChecked=0, Total=3192 [2022-11-21 09:12:20,867 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 199 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:20,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 109 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 09:12:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-21 09:12:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-11-21 09:12:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-11-21 09:12:20,869 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 29 [2022-11-21 09:12:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:20,870 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-11-21 09:12:20,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-11-21 09:12:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 09:12:20,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:20,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:20,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:21,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-21 09:12:21,084 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1655461096, now seen corresponding path program 2 times [2022-11-21 09:12:21,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:21,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426812890] [2022-11-21 09:12:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:21,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:21,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:21,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426812890] [2022-11-21 09:12:21,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426812890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:21,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594247789] [2022-11-21 09:12:21,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:12:21,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:21,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:21,570 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:21,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 09:12:21,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:12:21,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:21,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 09:12:21,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:21,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:12:21,761 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 [2022-11-21 09:12:21,766 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 [2022-11-21 09:12:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:22,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:22,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 09:12:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:22,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594247789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:22,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:22,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-11-21 09:12:22,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744009652] [2022-11-21 09:12:22,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:22,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 09:12:22,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 09:12:22,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-11-21 09:12:22,771 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 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) [2022-11-21 09:12:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:23,476 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-11-21 09:12:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 09:12:23,477 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 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) Word has length 30 [2022-11-21 09:12:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:23,477 INFO L225 Difference]: With dead ends: 39 [2022-11-21 09:12:23,477 INFO L226 Difference]: Without dead ends: 39 [2022-11-21 09:12:23,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 09:12:23,478 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 186 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:23,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 73 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:12:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-21 09:12:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-21 09:12:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.0810810810810811) 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) [2022-11-21 09:12:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-21 09:12:23,480 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 30 [2022-11-21 09:12:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:23,480 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-21 09:12:23,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 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) [2022-11-21 09:12:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-21 09:12:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 09:12:23,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:23,481 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:23,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:23,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-21 09:12:23,687 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)] === [2022-11-21 09:12:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash 651531229, now seen corresponding path program 3 times [2022-11-21 09:12:23,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:23,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624535403] [2022-11-21 09:12:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:23,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:24,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:24,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624535403] [2022-11-21 09:12:24,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624535403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:24,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626892045] [2022-11-21 09:12:24,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:12:24,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:24,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:24,226 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:24,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 09:12:24,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 09:12:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-21 09:12:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:24,419 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 10 treesize of output 8 [2022-11-21 09:12:24,789 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 [2022-11-21 09:12:25,060 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 [2022-11-21 09:12:25,233 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 [2022-11-21 09:12:25,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 09:12:25,400 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 18 treesize of output 7 [2022-11-21 09:12:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:25,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:25,597 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_420 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_420) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-21 09:12:25,610 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_420 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_420) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2022-11-21 09:12:25,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:25,778 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 [2022-11-21 09:12:25,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:25,795 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 [2022-11-21 09:12:25,817 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 [2022-11-21 09:12:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-21 09:12:26,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626892045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:26,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:26,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 38 [2022-11-21 09:12:26,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049076390] [2022-11-21 09:12:26,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:26,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-21 09:12:26,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:26,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-21 09:12:26,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1165, Unknown=2, NotChecked=138, Total=1406 [2022-11-21 09:12:26,404 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:28,358 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2022-11-21 09:12:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 09:12:28,359 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2022-11-21 09:12:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:28,359 INFO L225 Difference]: With dead ends: 59 [2022-11-21 09:12:28,359 INFO L226 Difference]: Without dead ends: 46 [2022-11-21 09:12:28,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=263, Invalid=2095, Unknown=2, NotChecked=190, Total=2550 [2022-11-21 09:12:28,361 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:28,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 220 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 441 Invalid, 1 Unknown, 59 Unchecked, 0.5s Time] [2022-11-21 09:12:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-21 09:12:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-11-21 09:12:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) 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) [2022-11-21 09:12:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-21 09:12:28,364 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 34 [2022-11-21 09:12:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:28,365 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-21 09:12:28,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-21 09:12:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 09:12:28,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:28,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:28,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-21 09:12:28,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-21 09:12:28,574 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)] === [2022-11-21 09:12:28,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:28,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1740941126, now seen corresponding path program 4 times [2022-11-21 09:12:28,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:28,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007062646] [2022-11-21 09:12:28,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:28,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007062646] [2022-11-21 09:12:29,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007062646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953747132] [2022-11-21 09:12:29,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:12:29,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:29,178 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:29,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 09:12:29,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:12:29,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:29,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-21 09:12:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:29,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:12:29,361 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 [2022-11-21 09:12:29,366 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 [2022-11-21 09:12:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:30,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:31,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 09:12:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:31,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953747132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:31,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:31,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 34 [2022-11-21 09:12:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577576566] [2022-11-21 09:12:31,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:31,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 09:12:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 09:12:31,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 09:12:31,170 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 35 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 35 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) [2022-11-21 09:12:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:32,039 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-21 09:12:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:12:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 35 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) Word has length 38 [2022-11-21 09:12:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:32,040 INFO L225 Difference]: With dead ends: 46 [2022-11-21 09:12:32,040 INFO L226 Difference]: Without dead ends: 46 [2022-11-21 09:12:32,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=399, Invalid=1671, Unknown=0, NotChecked=0, Total=2070 [2022-11-21 09:12:32,042 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 242 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:32,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 88 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 09:12:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-21 09:12:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-11-21 09:12:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-11-21 09:12:32,045 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2022-11-21 09:12:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:32,045 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-11-21 09:12:32,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 35 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) [2022-11-21 09:12:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-11-21 09:12:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-21 09:12:32,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:32,046 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:32,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:32,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 09:12:32,253 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1647975924, now seen corresponding path program 5 times [2022-11-21 09:12:32,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:32,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867099328] [2022-11-21 09:12:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:33,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:33,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867099328] [2022-11-21 09:12:33,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867099328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:33,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525256934] [2022-11-21 09:12:33,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:12:33,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:33,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:33,066 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:33,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 09:12:33,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-21 09:12:33,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:33,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-21 09:12:33,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:33,233 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 [2022-11-21 09:12:33,540 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 [2022-11-21 09:12:33,682 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 [2022-11-21 09:12:33,764 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 [2022-11-21 09:12:33,792 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 [2022-11-21 09:12:33,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 09:12:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:33,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:34,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:34,161 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 [2022-11-21 09:12:34,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:34,170 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 [2022-11-21 09:12:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:34,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525256934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:34,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:34,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 31 [2022-11-21 09:12:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441256865] [2022-11-21 09:12:34,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:34,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 09:12:34,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 09:12:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=805, Unknown=36, NotChecked=0, Total=930 [2022-11-21 09:12:34,438 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:35,447 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-11-21 09:12:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 09:12:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-21 09:12:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:35,449 INFO L225 Difference]: With dead ends: 68 [2022-11-21 09:12:35,449 INFO L226 Difference]: Without dead ends: 51 [2022-11-21 09:12:35,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=238, Invalid=1703, Unknown=39, NotChecked=0, Total=1980 [2022-11-21 09:12:35,450 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:35,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 225 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 09:12:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-21 09:12:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-11-21 09:12:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-11-21 09:12:35,451 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2022-11-21 09:12:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:35,451 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-11-21 09:12:35,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-11-21 09:12:35,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 09:12:35,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:35,453 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:35,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:35,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:35,657 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1728866697, now seen corresponding path program 6 times [2022-11-21 09:12:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:35,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723633553] [2022-11-21 09:12:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:35,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:36,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:36,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723633553] [2022-11-21 09:12:36,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723633553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:36,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361315365] [2022-11-21 09:12:36,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:12:36,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:36,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:36,220 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:36,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 09:12:36,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-21 09:12:36,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 09:12:36,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:36,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:37,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-21 09:12:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:37,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361315365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:37,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:37,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-11-21 09:12:37,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799047760] [2022-11-21 09:12:37,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:37,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:12:37,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:37,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:12:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:12:37,364 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 32 states have (on average 3.40625) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:37,949 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-11-21 09:12:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:12:37,952 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.40625) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-21 09:12:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:37,952 INFO L225 Difference]: With dead ends: 56 [2022-11-21 09:12:37,952 INFO L226 Difference]: Without dead ends: 56 [2022-11-21 09:12:37,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=1235, Unknown=0, NotChecked=0, Total=1560 [2022-11-21 09:12:37,954 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 251 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:37,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 154 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 09:12:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-21 09:12:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-11-21 09:12:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.0612244897959184) 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) [2022-11-21 09:12:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-21 09:12:37,957 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2022-11-21 09:12:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:37,957 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-21 09:12:37,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.40625) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-21 09:12:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 09:12:37,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:37,959 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:37,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:38,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:38,165 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)] === [2022-11-21 09:12:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2055260068, now seen corresponding path program 5 times [2022-11-21 09:12:38,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:38,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209184865] [2022-11-21 09:12:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:38,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:38,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:38,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209184865] [2022-11-21 09:12:38,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209184865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:38,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402648185] [2022-11-21 09:12:38,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:12:38,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:38,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:38,870 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:38,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 09:12:39,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-21 09:12:39,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-21 09:12:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:39,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:12:39,136 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 [2022-11-21 09:12:39,154 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 [2022-11-21 09:12:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:40,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:41,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 09:12:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:41,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402648185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:41,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:41,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 39 [2022-11-21 09:12:41,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341682772] [2022-11-21 09:12:41,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:41,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-21 09:12:41,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:41,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-21 09:12:41,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-11-21 09:12:41,355 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 40 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 40 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) [2022-11-21 09:12:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:42,578 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-11-21 09:12:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 09:12:42,579 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 40 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-21 09:12:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:42,579 INFO L225 Difference]: With dead ends: 54 [2022-11-21 09:12:42,579 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 09:12:42,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=489, Invalid=2163, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 09:12:42,581 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 263 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:42,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 194 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 09:12:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 09:12:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-11-21 09:12:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-11-21 09:12:42,584 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2022-11-21 09:12:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:42,584 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-11-21 09:12:42,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 40 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) [2022-11-21 09:12:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-11-21 09:12:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-21 09:12:42,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:42,585 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:42,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-21 09:12:42,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-21 09:12:42,792 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash 801080082, now seen corresponding path program 7 times [2022-11-21 09:12:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:42,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521866979] [2022-11-21 09:12:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:42,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:43,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:43,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521866979] [2022-11-21 09:12:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521866979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865837215] [2022-11-21 09:12:43,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 09:12:43,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:43,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:43,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:43,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 09:12:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:43,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-21 09:12:43,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:43,784 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 [2022-11-21 09:12:44,082 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 [2022-11-21 09:12:44,216 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 17 treesize of output 19 [2022-11-21 09:12:44,287 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 [2022-11-21 09:12:44,317 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 [2022-11-21 09:12:44,340 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 [2022-11-21 09:12:44,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 09:12:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:44,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:44,404 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_684) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-21 09:12:44,414 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_684) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2022-11-21 09:12:44,532 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_684) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2022-11-21 09:12:44,554 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 4)) 0)) is different from false [2022-11-21 09:12:44,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:44,566 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 [2022-11-21 09:12:44,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:44,577 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 [2022-11-21 09:12:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2022-11-21 09:12:44,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865837215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:44,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:44,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 35 [2022-11-21 09:12:44,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123873065] [2022-11-21 09:12:44,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:44,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 09:12:44,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:44,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 09:12:44,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=16, NotChecked=244, Total=1190 [2022-11-21 09:12:44,870 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:46,035 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-11-21 09:12:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 09:12:46,036 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 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 49 [2022-11-21 09:12:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:46,036 INFO L225 Difference]: With dead ends: 80 [2022-11-21 09:12:46,036 INFO L226 Difference]: Without dead ends: 59 [2022-11-21 09:12:46,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=195, Invalid=1610, Unknown=17, NotChecked=340, Total=2162 [2022-11-21 09:12:46,038 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 16 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:46,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 345 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 765 Invalid, 6 Unknown, 158 Unchecked, 0.6s Time] [2022-11-21 09:12:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-21 09:12:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-11-21 09:12:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-11-21 09:12:46,041 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2022-11-21 09:12:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:46,041 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-11-21 09:12:46,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-11-21 09:12:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 09:12:46,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:46,042 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:46,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:46,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:46,249 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:46,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1870280555, now seen corresponding path program 8 times [2022-11-21 09:12:46,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:46,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132806620] [2022-11-21 09:12:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:46,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 32 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:46,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132806620] [2022-11-21 09:12:46,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132806620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878048569] [2022-11-21 09:12:46,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:12:46,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:46,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:46,878 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:46,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 09:12:47,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:12:47,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-21 09:12:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:47,043 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:12:47,043 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 [2022-11-21 09:12:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 45 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:47,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 45 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:48,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878048569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:48,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:48,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2022-11-21 09:12:48,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526933808] [2022-11-21 09:12:48,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:48,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-21 09:12:48,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-21 09:12:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 09:12:48,048 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:48,663 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-21 09:12:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 09:12:48,663 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-21 09:12:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:48,664 INFO L225 Difference]: With dead ends: 64 [2022-11-21 09:12:48,664 INFO L226 Difference]: Without dead ends: 64 [2022-11-21 09:12:48,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 09:12:48,665 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 272 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:48,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 196 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 09:12:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-21 09:12:48,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-11-21 09:12:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.0526315789473684) 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) [2022-11-21 09:12:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-11-21 09:12:48,668 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2022-11-21 09:12:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:48,668 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-11-21 09:12:48,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-11-21 09:12:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 09:12:48,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:48,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:48,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:48,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:48,873 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)] === [2022-11-21 09:12:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2144122370, now seen corresponding path program 6 times [2022-11-21 09:12:48,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:48,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098728910] [2022-11-21 09:12:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:48,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:49,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:49,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098728910] [2022-11-21 09:12:49,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098728910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:49,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335341641] [2022-11-21 09:12:49,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:12:49,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:49,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:49,706 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:49,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 09:12:49,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-21 09:12:49,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-21 09:12:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:49,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:12:49,976 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 [2022-11-21 09:12:49,981 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 [2022-11-21 09:12:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:50,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:51,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 09:12:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 66 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:51,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335341641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:51,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:51,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2022-11-21 09:12:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658476027] [2022-11-21 09:12:51,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:51,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-21 09:12:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-21 09:12:51,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2022-11-21 09:12:51,752 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 47 states, 46 states have (on average 3.4782608695652173) internal successors, (160), 47 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) [2022-11-21 09:12:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:53,012 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-11-21 09:12:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 09:12:53,013 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.4782608695652173) internal successors, (160), 47 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) Word has length 54 [2022-11-21 09:12:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:53,013 INFO L225 Difference]: With dead ends: 62 [2022-11-21 09:12:53,013 INFO L226 Difference]: Without dead ends: 62 [2022-11-21 09:12:53,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=624, Invalid=3036, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 09:12:53,015 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 280 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:53,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 213 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 09:12:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-21 09:12:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-11-21 09:12:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-11-21 09:12:53,018 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2022-11-21 09:12:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:53,018 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-11-21 09:12:53,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.4782608695652173) internal successors, (160), 47 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) [2022-11-21 09:12:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-11-21 09:12:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 09:12:53,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:53,019 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:53,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:53,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-21 09:12:53,221 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash -795904464, now seen corresponding path program 9 times [2022-11-21 09:12:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:53,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010556526] [2022-11-21 09:12:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:54,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:54,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010556526] [2022-11-21 09:12:54,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010556526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:54,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490055554] [2022-11-21 09:12:54,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:12:54,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:54,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:54,202 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:54,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 09:12:54,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-21 09:12:54,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:54,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-21 09:12:54,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:54,565 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 [2022-11-21 09:12:54,871 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 13 treesize of output 9 [2022-11-21 09:12:54,901 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 14 treesize of output 16 [2022-11-21 09:12:54,973 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 14 treesize of output 16 [2022-11-21 09:12:55,036 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 14 treesize of output 16 [2022-11-21 09:12:55,099 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 14 treesize of output 16 [2022-11-21 09:12:55,162 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 14 treesize of output 16 [2022-11-21 09:12:55,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 09:12:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:55,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:12:55,249 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_877) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2022-11-21 09:12:55,257 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_877) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2022-11-21 09:12:55,490 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_877) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)))) is different from false [2022-11-21 09:12:55,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:55,506 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 [2022-11-21 09:12:55,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:12:55,517 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 [2022-11-21 09:12:55,521 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 [2022-11-21 09:12:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 27 not checked. [2022-11-21 09:12:56,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490055554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:12:56,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:12:56,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 43 [2022-11-21 09:12:56,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676058264] [2022-11-21 09:12:56,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:12:56,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 09:12:56,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:12:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 09:12:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1418, Unknown=29, NotChecked=234, Total=1806 [2022-11-21 09:12:56,070 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 43 states, 43 states have (on average 3.0) internal successors, (129), 43 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:57,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:12:57,442 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-11-21 09:12:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 09:12:57,443 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0) internal successors, (129), 43 states have internal predecessors, (129), 0 states have call successors, (0), 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 57 [2022-11-21 09:12:57,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:12:57,443 INFO L225 Difference]: With dead ends: 92 [2022-11-21 09:12:57,444 INFO L226 Difference]: Without dead ends: 67 [2022-11-21 09:12:57,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=294, Invalid=2767, Unknown=31, NotChecked=330, Total=3422 [2022-11-21 09:12:57,445 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 09:12:57,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 423 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 969 Invalid, 2 Unknown, 143 Unchecked, 0.6s Time] [2022-11-21 09:12:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-21 09:12:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-21 09:12:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-11-21 09:12:57,448 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 57 [2022-11-21 09:12:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:12:57,448 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-11-21 09:12:57,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0) internal successors, (129), 43 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:12:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-11-21 09:12:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-21 09:12:57,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:12:57,449 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:12:57,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-21 09:12:57,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-21 09:12:57,656 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-21 09:12:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:12:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1548060851, now seen corresponding path program 10 times [2022-11-21 09:12:57,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:12:57,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134395073] [2022-11-21 09:12:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:12:57,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:12:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:12:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:12:58,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:12:58,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134395073] [2022-11-21 09:12:58,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134395073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:12:58,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414373651] [2022-11-21 09:12:58,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:12:58,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:12:58,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:12:58,347 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:12:58,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d68471-6154-4467-852c-370c597c7670/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 09:12:58,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:12:58,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:12:58,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-21 09:12:58,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:12:58,663 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 [2022-11-21 09:12:58,932 INFO L321 Elim1Store]: treesize reduction 39, result has 56.2 percent of original size [2022-11-21 09:12:58,932 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 [2022-11-21 09:12:59,749 INFO L321 Elim1Store]: treesize reduction 69, result has 50.0 percent of original size [2022-11-21 09:12:59,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 134 [2022-11-21 09:13:01,749 INFO L321 Elim1Store]: treesize reduction 100, result has 46.8 percent of original size [2022-11-21 09:13:01,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 123 treesize of output 183 [2022-11-21 09:13:03,451 INFO L321 Elim1Store]: treesize reduction 131, result has 45.0 percent of original size [2022-11-21 09:13:03,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 166 treesize of output 239 [2022-11-21 09:13:13,060 WARN L233 SmtUtils]: Spent 9.17s on a formula simplification. DAG size of input: 90 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:13:15,253 INFO L321 Elim1Store]: treesize reduction 175, result has 56.3 percent of original size [2022-11-21 09:13:15,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 266 treesize of output 444 [2022-11-21 09:16:39,140 WARN L233 SmtUtils]: Spent 16.34s on a formula simplification. DAG size of input: 1186 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:16:41,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:16:41,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 416 treesize of output 642 [2022-11-21 09:16:51,782 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:16:52,091 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:16:52,193 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:16:52,306 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:16:52,725 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:16:52,872 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:16:52,962 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:16:53,820 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:16:53,914 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:16:54,638 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:16:55,018 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-11-21 09:16:56,972 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:16:57,094 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:16:57,459 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:16:57,783 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:17:21,525 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:23,190 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:23,284 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:24,720 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:24,784 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:25,864 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:26,704 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:26,972 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:17:27,174 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:29,234 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:29,330 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:30,277 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:30,532 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:17:30,796 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:33,592 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:33,668 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:34,334 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:34,408 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:34,491 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:36,919 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:37,225 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:38,153 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:38,404 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:17:38,694 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:39,941 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:40,108 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:17:40,527 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:40,543 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:40,593 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:41,629 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:41,665 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:41,721 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:42,920 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:17:43,039 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:44,175 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 09:17:44,282 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:44,338 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:44,528 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:55,050 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:55,214 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:17:55,230 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:57,494 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:57,665 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:57,767 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:58,110 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:58,386 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:58,577 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:58,930 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:59,229 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:59,516 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:17:59,736 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:00,253 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:01,060 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:01,293 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:01,541 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:01,711 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:02,915 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:03,038 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:03,114 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:03,519 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:03,634 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:03,697 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:03,873 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:04,166 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:04,428 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:04,567 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:04,914 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:05,107 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:05,301 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:05,835 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:06,001 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:06,382 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:06,622 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:06,914 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:08,102 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:08,263 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:08,350 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:08,764 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:08,780 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:08,934 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:09,439 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:09,678 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:09,974 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:10,200 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:10,227 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:11,556 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:11,609 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:11,697 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:12,175 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:12,309 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:12,382 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:12,935 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:13,162 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:13,452 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:13,643 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:13,699 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:14,553 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:14,723 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:14,979 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:15,247 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:15,409 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:15,541 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:15,963 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:16,173 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:16,495 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:16,764 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:17,345 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:18,248 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:18,447 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:18,543 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:19,014 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:19,110 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:19,217 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:19,488 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:19,972 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:20,199 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:20,445 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:20,680 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 09:18:21,353 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:21,507 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:21,749 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:21,882 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:22,364 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:22,505 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:22,580 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:22,767 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:22,844 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:23,105 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:23,502 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:26,983 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:27,320 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:27,550 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:27,912 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:28,347 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:29,193 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:29,340 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:29,500 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:29,951 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:30,205 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:30,407 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:34,104 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:34,602 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:34,716 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:34,843 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:35,430 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:35,555 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:35,764 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:36,328 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:36,705 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:36,861 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:37,238 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:37,929 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:38,012 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:38,216 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:38,812 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:38,981 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:39,087 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:39,303 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:40,153 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:40,379 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:40,622 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:41,029 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:44,238 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:44,761 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:44,906 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:45,194 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:45,671 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:45,798 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:45,913 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:46,449 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:46,691 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:47,017 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:47,213 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 09:18:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 19 proven. 65 refuted. 1 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-21 09:18:55,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:19:20,266 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 111860 treesize of output 111688 [2022-11-21 09:19:22,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 59950 treesize of output 59608