./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:38:05,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:38:05,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:38:05,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:38:05,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:38:05,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:38:05,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:38:05,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:38:05,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:38:05,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:38:05,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:38:05,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:38:05,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:38:05,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:38:05,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:38:05,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:38:05,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:38:05,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:38:05,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:38:05,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:38:05,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:38:05,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:38:05,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:38:05,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:38:05,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:38:05,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:38:05,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:38:05,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:38:05,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:38:05,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:38:05,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:38:05,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:38:05,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:38:05,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:38:05,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:38:05,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:38:05,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:38:05,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:38:05,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:38:05,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:38:05,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:38:05,708 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:38:05,753 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:38:05,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:38:05,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:38:05,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:38:05,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:38:05,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:38:05,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:38:05,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:38:05,757 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:38:05,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:38:05,758 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:38:05,758 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:38:05,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:38:05,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:38:05,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:38:05,759 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:38:05,760 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:38:05,760 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:38:05,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:38:05,760 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:38:05,761 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:38:05,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:38:05,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:38:05,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:38:05,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:38:05,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:38:05,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:38:05,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:38:05,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:38:05,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:38:05,769 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_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd [2022-11-18 20:38:06,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:38:06,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:38:06,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:38:06,072 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:38:06,073 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:38:06,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2022-11-18 20:38:06,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/data/1b169e162/e0e5b9b89c7f48e19bfeaea964ae6f19/FLAG3c05111b0 [2022-11-18 20:38:06,669 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:38:06,674 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2022-11-18 20:38:06,693 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/data/1b169e162/e0e5b9b89c7f48e19bfeaea964ae6f19/FLAG3c05111b0 [2022-11-18 20:38:06,983 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/data/1b169e162/e0e5b9b89c7f48e19bfeaea964ae6f19 [2022-11-18 20:38:06,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:38:06,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:38:06,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:38:06,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:38:06,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:38:06,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:38:06" (1/1) ... [2022-11-18 20:38:07,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a724cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:06, skipping insertion in model container [2022-11-18 20:38:07,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:38:06" (1/1) ... [2022-11-18 20:38:07,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:38:07,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:38:07,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:38:07,503 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:38:07,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:38:07,587 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:38:07,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07 WrapperNode [2022-11-18 20:38:07,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:38:07,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:38:07,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:38:07,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:38:07,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,662 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2022-11-18 20:38:07,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:38:07,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:38:07,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:38:07,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:38:07,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:38:07,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:38:07,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:38:07,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:38:07,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (1/1) ... [2022-11-18 20:38:07,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:38:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:07,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:38:07,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:38:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:38:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:38:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:38:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:38:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:38:07,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:38:07,906 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:38:07,909 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:38:08,242 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:38:08,250 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:38:08,250 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:38:08,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:38:08 BoogieIcfgContainer [2022-11-18 20:38:08,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:38:08,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:38:08,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:38:08,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:38:08,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:38:06" (1/3) ... [2022-11-18 20:38:08,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d5d668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:38:08, skipping insertion in model container [2022-11-18 20:38:08,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:38:07" (2/3) ... [2022-11-18 20:38:08,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d5d668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:38:08, skipping insertion in model container [2022-11-18 20:38:08,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:38:08" (3/3) ... [2022-11-18 20:38:08,271 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2022-11-18 20:38:08,295 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:38:08,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-11-18 20:38:08,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:38:08,397 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;@5ec71a2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:38:08,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-11-18 20:38:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:38:08,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:08,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:08,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-11-18 20:38:08,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:08,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184253361] [2022-11-18 20:38:08,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:08,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:08,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:08,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184253361] [2022-11-18 20:38:08,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184253361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:08,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:08,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:38:08,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979121982] [2022-11-18 20:38:08,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:08,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:38:08,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:38:08,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:08,906 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:09,013 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-11-18 20:38:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:38:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:38:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:09,031 INFO L225 Difference]: With dead ends: 92 [2022-11-18 20:38:09,031 INFO L226 Difference]: Without dead ends: 88 [2022-11-18 20:38:09,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:09,039 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:09,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 142 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-18 20:38:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2022-11-18 20:38:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.78125) internal successors, (57), 50 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) [2022-11-18 20:38:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-18 20:38:09,087 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 7 [2022-11-18 20:38:09,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:09,088 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-18 20:38:09,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:09,089 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-18 20:38:09,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:38:09,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:09,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:09,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:38:09,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-11-18 20:38:09,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:09,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773252870] [2022-11-18 20:38:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:09,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:09,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773252870] [2022-11-18 20:38:09,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773252870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:09,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:09,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:38:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341158153] [2022-11-18 20:38:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:09,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:38:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:38:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:38:09,249 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:09,292 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-11-18 20:38:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:38:09,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:38:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:09,294 INFO L225 Difference]: With dead ends: 49 [2022-11-18 20:38:09,294 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 20:38:09,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:38:09,296 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:09,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 20:38:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-18 20:38:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.71875) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-18 20:38:09,302 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 7 [2022-11-18 20:38:09,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:09,303 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-18 20:38:09,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-18 20:38:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:38:09,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:09,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:09,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:38:09,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:09,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:09,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-11-18 20:38:09,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:09,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063717313] [2022-11-18 20:38:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:09,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:09,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063717313] [2022-11-18 20:38:09,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063717313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:09,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:09,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:38:09,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853390151] [2022-11-18 20:38:09,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:09,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:38:09,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:38:09,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:38:09,597 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:09,746 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-11-18 20:38:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:38:09,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:38:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:09,748 INFO L225 Difference]: With dead ends: 89 [2022-11-18 20:38:09,748 INFO L226 Difference]: Without dead ends: 89 [2022-11-18 20:38:09,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:38:09,749 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:09,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 77 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-18 20:38:09,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 51. [2022-11-18 20:38:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-11-18 20:38:09,756 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 7 [2022-11-18 20:38:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:09,756 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-11-18 20:38:09,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-11-18 20:38:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:38:09,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:09,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:09,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:38:09,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-11-18 20:38:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880250158] [2022-11-18 20:38:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:10,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:10,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880250158] [2022-11-18 20:38:10,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880250158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:10,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:10,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:38:10,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104433369] [2022-11-18 20:38:10,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:10,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:38:10,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:10,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:38:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:10,066 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:10,138 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-11-18 20:38:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:38:10,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:38:10,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:10,144 INFO L225 Difference]: With dead ends: 86 [2022-11-18 20:38:10,144 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 20:38:10,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:10,146 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 75 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:10,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 78 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 20:38:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2022-11-18 20:38:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.675) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-18 20:38:10,160 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 9 [2022-11-18 20:38:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:10,161 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-18 20:38:10,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,161 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-18 20:38:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:38:10,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:10,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:10,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:38:10,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:10,165 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-11-18 20:38:10,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:10,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537734317] [2022-11-18 20:38:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:10,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:10,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:10,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537734317] [2022-11-18 20:38:10,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537734317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:10,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:10,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:38:10,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082940817] [2022-11-18 20:38:10,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:10,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:38:10,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:10,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:38:10,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:10,244 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:10,275 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2022-11-18 20:38:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:38:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:38:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:10,277 INFO L225 Difference]: With dead ends: 101 [2022-11-18 20:38:10,277 INFO L226 Difference]: Without dead ends: 101 [2022-11-18 20:38:10,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:10,279 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:10,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 129 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-18 20:38:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2022-11-18 20:38:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 69 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-11-18 20:38:10,286 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 9 [2022-11-18 20:38:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:10,286 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-11-18 20:38:10,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-11-18 20:38:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:38:10,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:10,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:10,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:38:10,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:10,288 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-11-18 20:38:10,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:10,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738260707] [2022-11-18 20:38:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:10,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:10,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:10,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738260707] [2022-11-18 20:38:10,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738260707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:10,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:10,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:38:10,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505339312] [2022-11-18 20:38:10,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:10,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:38:10,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:10,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:38:10,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:38:10,327 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:10,367 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2022-11-18 20:38:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:38:10,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:38:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:10,372 INFO L225 Difference]: With dead ends: 68 [2022-11-18 20:38:10,372 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 20:38:10,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:38:10,377 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:10,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 35 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 20:38:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-18 20:38:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.509433962264151) internal successors, (80), 67 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2022-11-18 20:38:10,382 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 9 [2022-11-18 20:38:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:10,383 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2022-11-18 20:38:10,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2022-11-18 20:38:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:38:10,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:10,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:10,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:38:10,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:10,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-11-18 20:38:10,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:10,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976937166] [2022-11-18 20:38:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:10,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:10,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:10,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976937166] [2022-11-18 20:38:10,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976937166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:10,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:10,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:38:10,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418213408] [2022-11-18 20:38:10,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:10,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:38:10,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:10,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:38:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:38:10,641 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:10,814 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2022-11-18 20:38:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:38:10,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:38:10,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:10,816 INFO L225 Difference]: With dead ends: 105 [2022-11-18 20:38:10,816 INFO L226 Difference]: Without dead ends: 105 [2022-11-18 20:38:10,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:38:10,819 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 122 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:10,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 71 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-18 20:38:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 72. [2022-11-18 20:38:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-11-18 20:38:10,835 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 9 [2022-11-18 20:38:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:10,835 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-11-18 20:38:10,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-11-18 20:38:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:38:10,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:10,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:10,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:38:10,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-11-18 20:38:10,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:10,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797578692] [2022-11-18 20:38:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:11,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:11,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797578692] [2022-11-18 20:38:11,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797578692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:11,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:11,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:38:11,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614052146] [2022-11-18 20:38:11,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:11,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:38:11,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:11,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:38:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:38:11,084 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:11,206 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-11-18 20:38:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:38:11,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:38:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:11,208 INFO L225 Difference]: With dead ends: 113 [2022-11-18 20:38:11,209 INFO L226 Difference]: Without dead ends: 113 [2022-11-18 20:38:11,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:38:11,213 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:11,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 74 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-18 20:38:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 72. [2022-11-18 20:38:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-11-18 20:38:11,234 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 9 [2022-11-18 20:38:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:11,235 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-11-18 20:38:11,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-11-18 20:38:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:38:11,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:11,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:11,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:38:11,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-11-18 20:38:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:11,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706035040] [2022-11-18 20:38:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:11,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:11,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706035040] [2022-11-18 20:38:11,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706035040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:11,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:11,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:38:11,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227564347] [2022-11-18 20:38:11,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:11,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:38:11,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:38:11,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:11,331 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:11,386 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2022-11-18 20:38:11,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:38:11,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 20:38:11,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:11,388 INFO L225 Difference]: With dead ends: 101 [2022-11-18 20:38:11,389 INFO L226 Difference]: Without dead ends: 101 [2022-11-18 20:38:11,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:11,392 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:11,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 72 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-18 20:38:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2022-11-18 20:38:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.5) internal successors, (90), 74 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) [2022-11-18 20:38:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-11-18 20:38:11,407 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 10 [2022-11-18 20:38:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:11,407 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-11-18 20:38:11,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-11-18 20:38:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:38:11,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:11,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:11,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:38:11,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:11,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:11,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2022-11-18 20:38:11,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:11,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145843655] [2022-11-18 20:38:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:11,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:11,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:11,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145843655] [2022-11-18 20:38:11,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145843655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:11,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:11,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:38:11,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788604864] [2022-11-18 20:38:11,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:11,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:38:11,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:38:11,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:38:11,629 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:11,777 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2022-11-18 20:38:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:38:11,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 20:38:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:11,779 INFO L225 Difference]: With dead ends: 107 [2022-11-18 20:38:11,779 INFO L226 Difference]: Without dead ends: 107 [2022-11-18 20:38:11,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:38:11,780 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 103 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:11,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 74 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:11,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-18 20:38:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2022-11-18 20:38:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.5) internal successors, (90), 74 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) [2022-11-18 20:38:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-11-18 20:38:11,783 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 10 [2022-11-18 20:38:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:11,783 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-11-18 20:38:11,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-11-18 20:38:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:38:11,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:11,784 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:11,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:38:11,785 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-11-18 20:38:11,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:11,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306595124] [2022-11-18 20:38:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:11,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:12,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:12,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306595124] [2022-11-18 20:38:12,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306595124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:12,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25755115] [2022-11-18 20:38:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:12,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:12,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:12,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:12,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:38:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:38:12,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:12,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:12,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-18 20:38:12,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:38:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:12,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:12,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:38:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:12,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25755115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:12,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:12,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-18 20:38:12,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59086994] [2022-11-18 20:38:12,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:12,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:38:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:12,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:38:12,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:38:12,671 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:13,069 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2022-11-18 20:38:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:38:13,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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) Word has length 11 [2022-11-18 20:38:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:13,071 INFO L225 Difference]: With dead ends: 148 [2022-11-18 20:38:13,071 INFO L226 Difference]: Without dead ends: 148 [2022-11-18 20:38:13,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:38:13,072 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 312 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:13,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 251 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:38:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-18 20:38:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 72. [2022-11-18 20:38:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:13,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-11-18 20:38:13,076 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 11 [2022-11-18 20:38:13,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:13,076 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-11-18 20:38:13,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-11-18 20:38:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:38:13,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:13,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:13,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:13,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:13,285 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-11-18 20:38:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:13,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223960649] [2022-11-18 20:38:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:13,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223960649] [2022-11-18 20:38:13,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223960649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:13,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:13,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:38:13,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701643126] [2022-11-18 20:38:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:13,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:38:13,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:38:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:38:13,397 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:13,497 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2022-11-18 20:38:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:38:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 20:38:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:13,498 INFO L225 Difference]: With dead ends: 92 [2022-11-18 20:38:13,498 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 20:38:13,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:38:13,499 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 180 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:13,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 75 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 20:38:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2022-11-18 20:38:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 76 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2022-11-18 20:38:13,506 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 12 [2022-11-18 20:38:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:13,506 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2022-11-18 20:38:13,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2022-11-18 20:38:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:38:13,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:13,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:13,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 20:38:13,509 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-11-18 20:38:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:13,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429350596] [2022-11-18 20:38:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:13,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:13,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:13,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429350596] [2022-11-18 20:38:13,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429350596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:13,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:13,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:38:13,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067642673] [2022-11-18 20:38:13,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:13,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:38:13,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:38:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:13,598 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:13,638 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-11-18 20:38:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:38:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 20:38:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:13,640 INFO L225 Difference]: With dead ends: 75 [2022-11-18 20:38:13,640 INFO L226 Difference]: Without dead ends: 75 [2022-11-18 20:38:13,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:38:13,641 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:13,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 47 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-18 20:38:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-18 20:38:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2022-11-18 20:38:13,644 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 12 [2022-11-18 20:38:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:13,645 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2022-11-18 20:38:13,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2022-11-18 20:38:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:38:13,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:13,646 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:13,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:38:13,647 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:13,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:13,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-11-18 20:38:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667629456] [2022-11-18 20:38:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:13,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:13,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667629456] [2022-11-18 20:38:13,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667629456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387355331] [2022-11-18 20:38:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:13,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:13,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:13,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:13,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:38:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:13,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:38:13,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:13,994 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:38:13,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-18 20:38:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:14,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:14,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387355331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:14,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:14,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-18 20:38:14,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47224572] [2022-11-18 20:38:14,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:14,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:38:14,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:14,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:38:14,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:38:14,510 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:14,929 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2022-11-18 20:38:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:38:14,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 20:38:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:14,931 INFO L225 Difference]: With dead ends: 140 [2022-11-18 20:38:14,931 INFO L226 Difference]: Without dead ends: 140 [2022-11-18 20:38:14,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:38:14,932 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 237 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:14,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 206 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:38:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-18 20:38:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 72. [2022-11-18 20:38:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 71 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-11-18 20:38:14,934 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 13 [2022-11-18 20:38:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:14,935 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-11-18 20:38:14,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-11-18 20:38:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:38:14,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:14,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:14,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:38:15,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:38:15,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:15,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1389200859, now seen corresponding path program 1 times [2022-11-18 20:38:15,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:15,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850562504] [2022-11-18 20:38:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:15,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:15,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850562504] [2022-11-18 20:38:15,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850562504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:15,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758017783] [2022-11-18 20:38:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:15,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:15,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:15,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:15,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:38:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:15,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:38:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:15,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-18 20:38:15,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:38:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:15,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:15,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:38:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:15,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758017783] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:15,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:38:15,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2022-11-18 20:38:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397275234] [2022-11-18 20:38:15,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:38:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:38:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:38:15,827 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:15,951 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-11-18 20:38:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:38:15,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 20:38:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:15,953 INFO L225 Difference]: With dead ends: 73 [2022-11-18 20:38:15,953 INFO L226 Difference]: Without dead ends: 73 [2022-11-18 20:38:15,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:38:15,954 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 112 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:15,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 42 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-18 20:38:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2022-11-18 20:38:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-11-18 20:38:15,956 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 13 [2022-11-18 20:38:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:15,957 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-11-18 20:38:15,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-11-18 20:38:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:38:15,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:15,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:15,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:16,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:38:16,159 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:16,159 INFO L85 PathProgramCache]: Analyzing trace with hash 172810975, now seen corresponding path program 1 times [2022-11-18 20:38:16,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:16,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229242963] [2022-11-18 20:38:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:16,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:16,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:16,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229242963] [2022-11-18 20:38:16,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229242963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:16,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:16,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:38:16,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556174480] [2022-11-18 20:38:16,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:16,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:38:16,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:16,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:38:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:38:16,217 INFO L87 Difference]: Start difference. First operand 59 states and 70 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) [2022-11-18 20:38:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:16,284 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-11-18 20:38:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:38:16,285 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 [2022-11-18 20:38:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:16,286 INFO L225 Difference]: With dead ends: 58 [2022-11-18 20:38:16,286 INFO L226 Difference]: Without dead ends: 58 [2022-11-18 20:38:16,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:38:16,287 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:16,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-18 20:38:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-18 20:38:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2022-11-18 20:38:16,290 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 14 [2022-11-18 20:38:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:16,290 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2022-11-18 20:38:16,290 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) [2022-11-18 20:38:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2022-11-18 20:38:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:38:16,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:16,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:16,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:38:16,292 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:16,292 INFO L85 PathProgramCache]: Analyzing trace with hash 172810976, now seen corresponding path program 1 times [2022-11-18 20:38:16,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:16,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708449289] [2022-11-18 20:38:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:16,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:16,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708449289] [2022-11-18 20:38:16,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708449289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:16,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:16,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:38:16,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204969980] [2022-11-18 20:38:16,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:16,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:38:16,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:16,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:38:16,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:38:16,450 INFO L87 Difference]: Start difference. First operand 58 states and 68 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) [2022-11-18 20:38:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:16,587 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-11-18 20:38:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:38:16,588 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 [2022-11-18 20:38:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:16,589 INFO L225 Difference]: With dead ends: 59 [2022-11-18 20:38:16,589 INFO L226 Difference]: Without dead ends: 59 [2022-11-18 20:38:16,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:38:16,589 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:16,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 81 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-18 20:38:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-11-18 20:38:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 57 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-11-18 20:38:16,592 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 14 [2022-11-18 20:38:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:16,592 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-11-18 20:38:16,592 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) [2022-11-18 20:38:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-11-18 20:38:16,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:38:16,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:16,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:16,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 20:38:16,593 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1912378887, now seen corresponding path program 1 times [2022-11-18 20:38:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:16,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600614487] [2022-11-18 20:38:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:16,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:16,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600614487] [2022-11-18 20:38:16,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600614487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112031461] [2022-11-18 20:38:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:16,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:16,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:16,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:38:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:17,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:38:17,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:17,053 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:38:17,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-18 20:38:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:17,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:17,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112031461] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:17,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:38:17,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 16 [2022-11-18 20:38:17,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773614923] [2022-11-18 20:38:17,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:38:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:17,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:38:17,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:38:17,480 INFO L87 Difference]: Start difference. First operand 58 states and 67 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) [2022-11-18 20:38:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:17,704 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-11-18 20:38:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:38:17,704 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 [2022-11-18 20:38:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:17,705 INFO L225 Difference]: With dead ends: 58 [2022-11-18 20:38:17,705 INFO L226 Difference]: Without dead ends: 58 [2022-11-18 20:38:17,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:38:17,706 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 103 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:17,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 45 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:17,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-18 20:38:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-11-18 20:38:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-11-18 20:38:17,709 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2022-11-18 20:38:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:17,709 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-11-18 20:38:17,709 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) [2022-11-18 20:38:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-11-18 20:38:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:38:17,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:17,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:17,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:17,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:38:17,911 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376192, now seen corresponding path program 1 times [2022-11-18 20:38:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:17,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382733290] [2022-11-18 20:38:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:17,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:17,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382733290] [2022-11-18 20:38:17,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382733290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:17,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:17,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:38:17,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682996905] [2022-11-18 20:38:17,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:17,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:38:17,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:17,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:38:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:38:17,982 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:18,046 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-11-18 20:38:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:38:18,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-18 20:38:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:18,047 INFO L225 Difference]: With dead ends: 53 [2022-11-18 20:38:18,048 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 20:38:18,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:38:18,049 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:18,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 61 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 20:38:18,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-18 20:38:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 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) [2022-11-18 20:38:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-18 20:38:18,052 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-11-18 20:38:18,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:18,052 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-18 20:38:18,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-18 20:38:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:38:18,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:18,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:18,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 20:38:18,054 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376191, now seen corresponding path program 1 times [2022-11-18 20:38:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:18,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626232888] [2022-11-18 20:38:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:18,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:18,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626232888] [2022-11-18 20:38:18,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626232888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:18,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:18,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:38:18,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726057000] [2022-11-18 20:38:18,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:18,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:38:18,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:18,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:38:18,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:38:18,210 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:18,336 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-11-18 20:38:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:38:18,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-18 20:38:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:18,337 INFO L225 Difference]: With dead ends: 74 [2022-11-18 20:38:18,337 INFO L226 Difference]: Without dead ends: 74 [2022-11-18 20:38:18,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:38:18,338 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:18,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 97 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-18 20:38:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2022-11-18 20:38:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-11-18 20:38:18,341 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 16 [2022-11-18 20:38:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:18,341 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-11-18 20:38:18,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-11-18 20:38:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:38:18,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:18,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 20:38:18,342 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032946, now seen corresponding path program 1 times [2022-11-18 20:38:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:18,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481026333] [2022-11-18 20:38:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:18,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:18,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481026333] [2022-11-18 20:38:18,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481026333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:18,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:18,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:38:18,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488716722] [2022-11-18 20:38:18,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:18,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:38:18,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:18,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:38:18,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:38:18,419 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2022-11-18 20:38:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:18,475 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-11-18 20:38:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:38:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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 [2022-11-18 20:38:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:18,479 INFO L225 Difference]: With dead ends: 53 [2022-11-18 20:38:18,479 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 20:38:18,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:38:18,480 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:18,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 64 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 20:38:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-18 20:38:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.297872340425532) internal successors, (61), 52 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) [2022-11-18 20:38:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-18 20:38:18,483 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 18 [2022-11-18 20:38:18,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:18,484 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-18 20:38:18,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2022-11-18 20:38:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-18 20:38:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:38:18,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:18,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:18,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 20:38:18,487 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032945, now seen corresponding path program 1 times [2022-11-18 20:38:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:18,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965789651] [2022-11-18 20:38:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:18,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:18,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:18,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965789651] [2022-11-18 20:38:18,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965789651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:18,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:18,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:38:18,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210261456] [2022-11-18 20:38:18,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:18,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:38:18,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:38:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:38:18,768 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 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) [2022-11-18 20:38:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:18,969 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2022-11-18 20:38:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:38:18,973 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 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 [2022-11-18 20:38:18,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:18,973 INFO L225 Difference]: With dead ends: 66 [2022-11-18 20:38:18,973 INFO L226 Difference]: Without dead ends: 66 [2022-11-18 20:38:18,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:38:18,974 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 101 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:18,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 101 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-18 20:38:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-11-18 20:38:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 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) [2022-11-18 20:38:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-11-18 20:38:18,977 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 18 [2022-11-18 20:38:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:18,977 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-11-18 20:38:18,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 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) [2022-11-18 20:38:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-11-18 20:38:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:38:18,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:18,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:18,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 20:38:18,978 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:18,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2123984178, now seen corresponding path program 1 times [2022-11-18 20:38:18,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:18,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414251624] [2022-11-18 20:38:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:18,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:19,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414251624] [2022-11-18 20:38:19,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414251624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:19,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:19,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:38:19,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446732121] [2022-11-18 20:38:19,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:19,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:38:19,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:38:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:38:19,255 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2022-11-18 20:38:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:19,399 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-11-18 20:38:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:38:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 [2022-11-18 20:38:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:19,401 INFO L225 Difference]: With dead ends: 81 [2022-11-18 20:38:19,401 INFO L226 Difference]: Without dead ends: 81 [2022-11-18 20:38:19,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:38:19,402 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:19,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 169 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-18 20:38:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-11-18 20:38:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-11-18 20:38:19,405 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 18 [2022-11-18 20:38:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:19,405 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-11-18 20:38:19,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2022-11-18 20:38:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-11-18 20:38:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:38:19,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:19,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:19,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 20:38:19,406 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1149914764, now seen corresponding path program 1 times [2022-11-18 20:38:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:19,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033354183] [2022-11-18 20:38:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:19,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:19,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:19,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033354183] [2022-11-18 20:38:19,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033354183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:19,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:19,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 20:38:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751834136] [2022-11-18 20:38:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:19,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:38:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:38:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:38:19,716 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-18 20:38:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:20,014 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2022-11-18 20:38:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:38:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 [2022-11-18 20:38:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:20,016 INFO L225 Difference]: With dead ends: 105 [2022-11-18 20:38:20,016 INFO L226 Difference]: Without dead ends: 105 [2022-11-18 20:38:20,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:38:20,017 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 130 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:20,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 177 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-18 20:38:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2022-11-18 20:38:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 72 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) [2022-11-18 20:38:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-18 20:38:20,019 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 18 [2022-11-18 20:38:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:20,020 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-18 20:38:20,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-18 20:38:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-18 20:38:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 20:38:20,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:20,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:20,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 20:38:20,021 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1419000974, now seen corresponding path program 1 times [2022-11-18 20:38:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:20,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745290535] [2022-11-18 20:38:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:20,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:20,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:20,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745290535] [2022-11-18 20:38:20,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745290535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:20,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:20,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:38:20,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597712892] [2022-11-18 20:38:20,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:20,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:38:20,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:20,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:38:20,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:38:20,235 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:20,260 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-11-18 20:38:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:38:20,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-18 20:38:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:20,261 INFO L225 Difference]: With dead ends: 72 [2022-11-18 20:38:20,262 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 20:38:20,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:38:20,262 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:20,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 58 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 20:38:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-18 20:38:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.225) internal successors, (49), 44 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) [2022-11-18 20:38:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-18 20:38:20,265 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 19 [2022-11-18 20:38:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:20,265 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-18 20:38:20,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-18 20:38:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 20:38:20,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:20,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:20,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-18 20:38:20,267 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:20,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:20,267 INFO L85 PathProgramCache]: Analyzing trace with hash 453336425, now seen corresponding path program 1 times [2022-11-18 20:38:20,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:20,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544916425] [2022-11-18 20:38:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:20,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:20,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:20,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544916425] [2022-11-18 20:38:20,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544916425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:20,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846596139] [2022-11-18 20:38:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:20,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:20,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:20,463 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:20,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:38:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:20,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:38:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:20,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:20,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:38:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:20,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846596139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:20,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:20,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-11-18 20:38:20,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51402879] [2022-11-18 20:38:20,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:20,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:38:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:38:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:38:20,838 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:21,057 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-11-18 20:38:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:38:21,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-18 20:38:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:21,058 INFO L225 Difference]: With dead ends: 60 [2022-11-18 20:38:21,058 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 20:38:21,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:38:21,059 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:21,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 88 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 20:38:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2022-11-18 20:38:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-18 20:38:21,061 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 22 [2022-11-18 20:38:21,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:21,061 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-18 20:38:21,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-18 20:38:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:38:21,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:21,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:21,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:21,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:21,269 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1864607690, now seen corresponding path program 1 times [2022-11-18 20:38:21,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:21,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773023888] [2022-11-18 20:38:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:21,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:21,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773023888] [2022-11-18 20:38:21,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773023888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:21,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:21,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 20:38:21,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141264304] [2022-11-18 20:38:21,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:21,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:38:21,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:21,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:38:21,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:38:21,646 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:21,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:21,895 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-11-18 20:38:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:38:21,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-18 20:38:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:21,896 INFO L225 Difference]: With dead ends: 55 [2022-11-18 20:38:21,896 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 20:38:21,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:38:21,897 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:21,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 161 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 20:38:21,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-18 20:38:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-11-18 20:38:21,899 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 24 [2022-11-18 20:38:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:21,900 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-11-18 20:38:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-11-18 20:38:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:38:21,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:21,900 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:21,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-18 20:38:21,901 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2007657780, now seen corresponding path program 1 times [2022-11-18 20:38:21,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:21,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50350731] [2022-11-18 20:38:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:21,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:22,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:22,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50350731] [2022-11-18 20:38:22,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50350731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:22,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:22,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 20:38:22,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787092333] [2022-11-18 20:38:22,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:22,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:38:22,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:38:22,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:38:22,367 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:22,659 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-11-18 20:38:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:38:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-18 20:38:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:22,660 INFO L225 Difference]: With dead ends: 51 [2022-11-18 20:38:22,660 INFO L226 Difference]: Without dead ends: 42 [2022-11-18 20:38:22,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:38:22,661 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:22,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 169 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-18 20:38:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-18 20:38:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.1714285714285715) 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) [2022-11-18 20:38:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-11-18 20:38:22,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 24 [2022-11-18 20:38:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:22,663 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-11-18 20:38:22,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-11-18 20:38:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:38:22,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:22,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:22,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-18 20:38:22,664 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2045741993, now seen corresponding path program 1 times [2022-11-18 20:38:22,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:22,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882105999] [2022-11-18 20:38:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:22,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:23,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882105999] [2022-11-18 20:38:23,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882105999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816852378] [2022-11-18 20:38:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:23,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:23,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:23,039 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:23,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:38:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:23,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:38:23,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:23,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:23,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:38:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:23,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816852378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:23,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:23,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-11-18 20:38:23,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238237476] [2022-11-18 20:38:23,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:23,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:38:23,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:23,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:38:23,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:38:23,471 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:23,813 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-11-18 20:38:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:38:23,813 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-18 20:38:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:23,814 INFO L225 Difference]: With dead ends: 45 [2022-11-18 20:38:23,814 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 20:38:23,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:38:23,815 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 159 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:23,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 87 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 20:38:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-11-18 20:38:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-11-18 20:38:23,817 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2022-11-18 20:38:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:23,817 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-11-18 20:38:23,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-11-18 20:38:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:38:23,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:23,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:23,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:24,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:38:24,018 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1136965878, now seen corresponding path program 1 times [2022-11-18 20:38:24,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:24,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842112493] [2022-11-18 20:38:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:24,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:38:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:24,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842112493] [2022-11-18 20:38:24,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842112493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:24,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52231176] [2022-11-18 20:38:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:24,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:24,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:24,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:24,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:38:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:38:24,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:38:24,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:24,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-18 20:38:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:38:24,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52231176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:24,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:24,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-18 20:38:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74925638] [2022-11-18 20:38:24,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:24,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:38:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:38:24,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:38:24,333 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 10 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) [2022-11-18 20:38:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:24,420 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-11-18 20:38:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:38:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-18 20:38:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:24,421 INFO L225 Difference]: With dead ends: 40 [2022-11-18 20:38:24,421 INFO L226 Difference]: Without dead ends: 40 [2022-11-18 20:38:24,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:38:24,422 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:24,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:38:24,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-18 20:38:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-18 20:38:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-11-18 20:38:24,424 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2022-11-18 20:38:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:24,424 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-11-18 20:38:24,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 10 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) [2022-11-18 20:38:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-11-18 20:38:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-18 20:38:24,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:24,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:24,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 20:38:24,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:24,631 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:24,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1702563688, now seen corresponding path program 1 times [2022-11-18 20:38:24,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:24,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983856041] [2022-11-18 20:38:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:24,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:25,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:25,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983856041] [2022-11-18 20:38:25,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983856041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:25,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003997244] [2022-11-18 20:38:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:25,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:25,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:25,063 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:25,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:38:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:25,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:38:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:25,187 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:38:25,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 20:38:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:25,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:25,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003997244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:25,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:25,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-11-18 20:38:25,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694043095] [2022-11-18 20:38:25,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:25,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:38:25,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:25,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:38:25,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:38:25,648 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:26,117 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-11-18 20:38:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:38:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-18 20:38:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:26,119 INFO L225 Difference]: With dead ends: 52 [2022-11-18 20:38:26,119 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 20:38:26,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:38:26,120 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 166 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:26,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 158 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:38:26,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 20:38:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2022-11-18 20:38:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-11-18 20:38:26,123 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2022-11-18 20:38:26,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:26,123 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-11-18 20:38:26,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-11-18 20:38:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-18 20:38:26,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:26,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:26,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:26,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:26,331 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1702514921, now seen corresponding path program 1 times [2022-11-18 20:38:26,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:26,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602002641] [2022-11-18 20:38:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:26,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:26,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:26,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602002641] [2022-11-18 20:38:26,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602002641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:26,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936120529] [2022-11-18 20:38:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:26,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:26,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:26,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:26,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:38:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:26,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 20:38:26,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:27,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:38:27,702 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 [2022-11-18 20:38:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:27,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:28,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:28,079 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 99 treesize of output 99 [2022-11-18 20:38:28,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-18 20:38:28,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:28,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2022-11-18 20:38:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:28,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936120529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:28,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:28,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 36 [2022-11-18 20:38:28,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309528520] [2022-11-18 20:38:28,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:28,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:38:28,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:38:28,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:38:28,321 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:29,385 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2022-11-18 20:38:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:38:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-18 20:38:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:29,386 INFO L225 Difference]: With dead ends: 109 [2022-11-18 20:38:29,386 INFO L226 Difference]: Without dead ends: 55 [2022-11-18 20:38:29,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=326, Invalid=2754, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 20:38:29,388 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:29,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 293 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 314 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-18 20:38:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-18 20:38:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-11-18 20:38:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-11-18 20:38:29,390 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 32 [2022-11-18 20:38:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:29,390 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-11-18 20:38:29,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-11-18 20:38:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 20:38:29,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:29,390 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:29,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 20:38:29,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-18 20:38:29,597 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2071618671, now seen corresponding path program 2 times [2022-11-18 20:38:29,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695117090] [2022-11-18 20:38:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:29,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:38:29,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695117090] [2022-11-18 20:38:29,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695117090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395737520] [2022-11-18 20:38:29,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:38:29,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:29,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:29,911 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:29,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:38:30,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:38:30,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:30,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:38:30,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:38:30,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:30,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:38:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:38:30,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395737520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:30,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:30,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-18 20:38:30,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947634610] [2022-11-18 20:38:30,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:30,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:38:30,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:30,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:38:30,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:38:30,544 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:30,938 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-11-18 20:38:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:38:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-18 20:38:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:30,939 INFO L225 Difference]: With dead ends: 60 [2022-11-18 20:38:30,939 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 20:38:30,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:38:30,940 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:30,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 189 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:38:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 20:38:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2022-11-18 20:38:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-11-18 20:38:30,942 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 40 [2022-11-18 20:38:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:30,942 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-11-18 20:38:30,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:30,943 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-11-18 20:38:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 20:38:30,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:30,943 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:30,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:31,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:31,149 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2039282674, now seen corresponding path program 2 times [2022-11-18 20:38:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:31,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136168689] [2022-11-18 20:38:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:31,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:38:31,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:31,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136168689] [2022-11-18 20:38:31,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136168689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:31,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494858107] [2022-11-18 20:38:31,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:38:31,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:31,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:31,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:31,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:38:31,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:38:31,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:31,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:38:31,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:38:31,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:32,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:38:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:38:32,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494858107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:32,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:32,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-11-18 20:38:32,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847362355] [2022-11-18 20:38:32,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:32,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:38:32,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:38:32,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:38:32,223 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:32,772 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-11-18 20:38:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:38:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-18 20:38:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:32,774 INFO L225 Difference]: With dead ends: 55 [2022-11-18 20:38:32,774 INFO L226 Difference]: Without dead ends: 55 [2022-11-18 20:38:32,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:38:32,775 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:32,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 217 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:38:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-18 20:38:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-11-18 20:38:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-11-18 20:38:32,776 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 42 [2022-11-18 20:38:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:32,777 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-11-18 20:38:32,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-11-18 20:38:32,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 20:38:32,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:32,778 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:32,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:32,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-18 20:38:32,978 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1309731743, now seen corresponding path program 2 times [2022-11-18 20:38:32,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:32,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666888625] [2022-11-18 20:38:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:32,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:38:33,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:33,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666888625] [2022-11-18 20:38:33,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666888625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:33,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087448598] [2022-11-18 20:38:33,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:38:33,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:33,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:33,435 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:33,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:38:33,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:38:33,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:38:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 20:38:33,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:38:33,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087448598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:33,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:38:33,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2022-11-18 20:38:33,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568552425] [2022-11-18 20:38:33,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:33,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:38:33,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:33,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:38:33,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:38:33,624 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:33,683 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-11-18 20:38:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:38:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 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 46 [2022-11-18 20:38:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:33,684 INFO L225 Difference]: With dead ends: 53 [2022-11-18 20:38:33,684 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 20:38:33,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:38:33,685 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:33,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 74 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 20:38:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-18 20:38:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-11-18 20:38:33,687 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2022-11-18 20:38:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:33,687 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-11-18 20:38:33,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-11-18 20:38:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 20:38:33,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:33,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:33,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:33,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 20:38:33,894 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:33,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1309682976, now seen corresponding path program 3 times [2022-11-18 20:38:33,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:33,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415025703] [2022-11-18 20:38:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:33,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:38:34,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415025703] [2022-11-18 20:38:34,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415025703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51292304] [2022-11-18 20:38:34,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:38:34,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:34,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:34,638 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:34,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:38:34,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:38:34,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:34,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-18 20:38:34,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:34,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:38:35,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:38:35,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 20:38:36,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:38:36,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:36,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-18 20:38:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:36,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:36,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:36,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 20:38:36,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:36,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 20:38:36,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-18 20:38:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:38:36,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51292304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:36,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:36,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 16] total 42 [2022-11-18 20:38:36,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481650261] [2022-11-18 20:38:36,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:36,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 20:38:36,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:36,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 20:38:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1554, Unknown=2, NotChecked=0, Total=1722 [2022-11-18 20:38:36,811 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:37,446 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-11-18 20:38:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:38:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-18 20:38:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:37,448 INFO L225 Difference]: With dead ends: 97 [2022-11-18 20:38:37,448 INFO L226 Difference]: Without dead ends: 57 [2022-11-18 20:38:37,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=281, Invalid=2267, Unknown=2, NotChecked=0, Total=2550 [2022-11-18 20:38:37,450 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 134 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:37,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 230 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 325 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-11-18 20:38:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-18 20:38:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-11-18 20:38:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-11-18 20:38:37,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 46 [2022-11-18 20:38:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:37,453 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-11-18 20:38:37,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-11-18 20:38:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:38:37,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:37,454 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:37,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:37,655 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2060686141, now seen corresponding path program 4 times [2022-11-18 20:38:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619864298] [2022-11-18 20:38:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:38:38,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:38,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619864298] [2022-11-18 20:38:38,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619864298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:38,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239889212] [2022-11-18 20:38:38,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:38:38,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:38,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:38,026 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:38,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:38:38,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:38:38,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-18 20:38:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:38,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:38:40,256 INFO L321 Elim1Store]: treesize reduction 137, result has 29.0 percent of original size [2022-11-18 20:38:40,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 79 [2022-11-18 20:38:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:38:40,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:42,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:42,046 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 287 treesize of output 271 [2022-11-18 20:38:42,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 192 [2022-11-18 20:38:42,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:42,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 119 treesize of output 163 [2022-11-18 20:38:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:38:43,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239889212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:43,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:43,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 26, 26] total 57 [2022-11-18 20:38:43,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902129597] [2022-11-18 20:38:43,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:43,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-18 20:38:43,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:43,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-18 20:38:43,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2956, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:38:43,772 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 57 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:46,331 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-11-18 20:38:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:38:46,332 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 57 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-18 20:38:46,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:46,332 INFO L225 Difference]: With dead ends: 90 [2022-11-18 20:38:46,332 INFO L226 Difference]: Without dead ends: 69 [2022-11-18 20:38:46,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=544, Invalid=6938, Unknown=0, NotChecked=0, Total=7482 [2022-11-18 20:38:46,336 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:46,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 306 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 552 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2022-11-18 20:38:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-18 20:38:46,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2022-11-18 20:38:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-11-18 20:38:46,339 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2022-11-18 20:38:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:46,339 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-11-18 20:38:46,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 57 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-11-18 20:38:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 20:38:46,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:46,341 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:46,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:46,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-18 20:38:46,547 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash 457880571, now seen corresponding path program 3 times [2022-11-18 20:38:46,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:46,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948034533] [2022-11-18 20:38:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:38:47,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948034533] [2022-11-18 20:38:47,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948034533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:47,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026905031] [2022-11-18 20:38:47,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:38:47,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:47,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:47,121 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:47,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:38:47,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:38:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:47,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 20:38:47,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:47,337 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:38:47,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 20:38:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:38:47,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:38:48,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026905031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:48,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:48,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2022-11-18 20:38:48,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560297246] [2022-11-18 20:38:48,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:48,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:38:48,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:48,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:38:48,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:38:48,124 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 36 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:48,830 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2022-11-18 20:38:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:38:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-18 20:38:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:48,831 INFO L225 Difference]: With dead ends: 65 [2022-11-18 20:38:48,831 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 20:38:48,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=422, Invalid=1740, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:38:48,832 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 264 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:48,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 199 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:38:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 20:38:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-11-18 20:38:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-11-18 20:38:48,834 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 56 [2022-11-18 20:38:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:48,835 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-11-18 20:38:48,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-11-18 20:38:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-18 20:38:48,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:48,836 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:48,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:49,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 20:38:49,043 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1318084201, now seen corresponding path program 5 times [2022-11-18 20:38:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:49,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128793706] [2022-11-18 20:38:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:38:49,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128793706] [2022-11-18 20:38:49,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128793706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771589440] [2022-11-18 20:38:49,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:38:49,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:49,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:49,805 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:49,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:38:49,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:38:49,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:49,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-18 20:38:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:50,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:38:51,230 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-11-18 20:38:51,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-11-18 20:38:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:51,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:51,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:51,924 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 99 treesize of output 99 [2022-11-18 20:38:51,962 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 30 treesize of output 26 [2022-11-18 20:38:51,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:51,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2022-11-18 20:38:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:38:52,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771589440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:52,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:52,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25, 21] total 55 [2022-11-18 20:38:52,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915755851] [2022-11-18 20:38:52,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:52,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 20:38:52,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 20:38:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2795, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 20:38:52,333 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 55 states, 55 states have (on average 2.7454545454545456) internal successors, (151), 55 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:54,229 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2022-11-18 20:38:54,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 20:38:54,229 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.7454545454545456) internal successors, (151), 55 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-18 20:38:54,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:54,230 INFO L225 Difference]: With dead ends: 177 [2022-11-18 20:38:54,230 INFO L226 Difference]: Without dead ends: 78 [2022-11-18 20:38:54,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=465, Invalid=6845, Unknown=0, NotChecked=0, Total=7310 [2022-11-18 20:38:54,233 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:54,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 475 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 766 Invalid, 0 Unknown, 89 Unchecked, 0.5s Time] [2022-11-18 20:38:54,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-18 20:38:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-11-18 20:38:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-11-18 20:38:54,245 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 60 [2022-11-18 20:38:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:54,245 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-11-18 20:38:54,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.7454545454545456) internal successors, (151), 55 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-11-18 20:38:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 20:38:54,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:54,247 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:54,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:54,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-18 20:38:54,451 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1403645923, now seen corresponding path program 6 times [2022-11-18 20:38:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520013820] [2022-11-18 20:38:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:54,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:38:54,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:54,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520013820] [2022-11-18 20:38:54,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520013820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:54,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173368964] [2022-11-18 20:38:54,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:38:54,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:54,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:54,959 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:54,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:38:55,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:38:55,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:55,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-18 20:38:55,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:55,236 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:38:55,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 20:38:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:38:55,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:38:56,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173368964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:56,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:56,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 41 [2022-11-18 20:38:56,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947759062] [2022-11-18 20:38:56,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:56,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 20:38:56,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 20:38:56,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:38:56,808 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 42 states, 41 states have (on average 3.902439024390244) internal successors, (160), 42 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:57,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:57,857 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-11-18 20:38:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:38:57,858 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.902439024390244) internal successors, (160), 42 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 68 [2022-11-18 20:38:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:57,858 INFO L225 Difference]: With dead ends: 80 [2022-11-18 20:38:57,858 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 20:38:57,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=669, Invalid=2753, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 20:38:57,860 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 483 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:57,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 203 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:38:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 20:38:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-11-18 20:38:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-11-18 20:38:57,863 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 68 [2022-11-18 20:38:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:57,863 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-11-18 20:38:57,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.902439024390244) internal successors, (160), 42 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-11-18 20:38:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:38:57,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:57,864 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:57,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:58,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 20:38:58,074 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:38:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash 284001220, now seen corresponding path program 4 times [2022-11-18 20:38:58,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:58,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317131681] [2022-11-18 20:38:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:38:58,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:58,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317131681] [2022-11-18 20:38:58,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317131681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:58,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133328893] [2022-11-18 20:38:58,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:38:58,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:58,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:58,656 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:58,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:38:58,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:38:58,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:38:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-18 20:38:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:58,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:39:02,126 INFO L321 Elim1Store]: treesize reduction 77, result has 76.1 percent of original size [2022-11-18 20:39:02,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 106 treesize of output 275 [2022-11-18 20:39:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 20:39:02,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:05,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:05,803 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 385 treesize of output 361 [2022-11-18 20:39:05,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:39:05,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 321 [2022-11-18 20:39:06,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:06,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 207 treesize of output 303 [2022-11-18 20:39:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 20:39:07,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133328893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:07,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:07,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 29, 29] total 68 [2022-11-18 20:39:07,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95233442] [2022-11-18 20:39:07,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:07,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 20:39:07,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:07,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 20:39:07,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=4186, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 20:39:07,910 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 69 states, 68 states have (on average 1.8676470588235294) internal successors, (127), 69 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:11,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:11,069 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-11-18 20:39:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 20:39:11,069 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.8676470588235294) internal successors, (127), 69 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-18 20:39:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:11,070 INFO L225 Difference]: With dead ends: 75 [2022-11-18 20:39:11,070 INFO L226 Difference]: Without dead ends: 75 [2022-11-18 20:39:11,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1266, Invalid=9654, Unknown=0, NotChecked=0, Total=10920 [2022-11-18 20:39:11,073 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:11,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 434 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 480 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-11-18 20:39:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-18 20:39:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-18 20:39:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-11-18 20:39:11,076 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2022-11-18 20:39:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:11,076 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-11-18 20:39:11,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.8676470588235294) internal successors, (127), 69 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-11-18 20:39:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:39:11,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:11,077 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:11,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:11,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:11,283 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:39:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:11,283 INFO L85 PathProgramCache]: Analyzing trace with hash 323232178, now seen corresponding path program 7 times [2022-11-18 20:39:11,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:11,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324924631] [2022-11-18 20:39:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:11,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:39:12,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:12,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324924631] [2022-11-18 20:39:12,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324924631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:12,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238152583] [2022-11-18 20:39:12,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:39:12,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:12,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:12,299 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:12,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:39:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:12,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-18 20:39:12,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:12,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:39:14,117 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-11-18 20:39:14,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-11-18 20:39:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:14,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:15,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:15,049 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 99 treesize of output 99 [2022-11-18 20:39:15,070 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 30 treesize of output 26 [2022-11-18 20:39:15,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:15,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2022-11-18 20:39:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:39:15,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238152583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:15,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:15,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29, 24] total 64 [2022-11-18 20:39:15,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166632768] [2022-11-18 20:39:15,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:15,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-18 20:39:15,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:15,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-18 20:39:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3829, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 20:39:15,541 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 64 states, 64 states have (on average 2.890625) internal successors, (185), 64 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:18,045 INFO L93 Difference]: Finished difference Result 210 states and 215 transitions. [2022-11-18 20:39:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-18 20:39:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.890625) internal successors, (185), 64 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-18 20:39:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:18,046 INFO L225 Difference]: With dead ends: 210 [2022-11-18 20:39:18,046 INFO L226 Difference]: Without dead ends: 89 [2022-11-18 20:39:18,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=533, Invalid=9367, Unknown=0, NotChecked=0, Total=9900 [2022-11-18 20:39:18,048 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 202 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:18,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 620 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1097 Invalid, 0 Unknown, 208 Unchecked, 0.6s Time] [2022-11-18 20:39:18,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-18 20:39:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2022-11-18 20:39:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-11-18 20:39:18,051 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 74 [2022-11-18 20:39:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:18,051 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-11-18 20:39:18,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.890625) internal successors, (185), 64 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-11-18 20:39:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 20:39:18,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:18,053 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:18,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:18,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:18,258 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:39:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2104292780, now seen corresponding path program 8 times [2022-11-18 20:39:18,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:18,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964896178] [2022-11-18 20:39:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:18,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:39:18,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964896178] [2022-11-18 20:39:18,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964896178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137364746] [2022-11-18 20:39:18,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:39:18,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:18,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:18,905 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:18,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:39:19,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:39:19,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:19,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 20:39:19,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:39:19,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:19,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:39:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:39:19,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137364746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:19,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:19,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-18 20:39:19,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247553652] [2022-11-18 20:39:19,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:19,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:39:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:19,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:39:19,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:39:19,937 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 33 states, 32 states have (on average 4.25) internal successors, (136), 33 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:20,563 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-11-18 20:39:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:39:20,564 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.25) internal successors, (136), 33 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 82 [2022-11-18 20:39:20,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:20,564 INFO L225 Difference]: With dead ends: 92 [2022-11-18 20:39:20,564 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 20:39:20,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 140 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:39:20,565 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 316 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:20,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 350 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:39:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 20:39:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-11-18 20:39:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-11-18 20:39:20,568 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 82 [2022-11-18 20:39:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:20,568 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-11-18 20:39:20,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.25) internal successors, (136), 33 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-11-18 20:39:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 20:39:20,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:20,570 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:20,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-18 20:39:20,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:20,776 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:39:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1498157893, now seen corresponding path program 9 times [2022-11-18 20:39:20,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:20,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27432416] [2022-11-18 20:39:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:20,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:39:21,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:21,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27432416] [2022-11-18 20:39:21,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27432416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:21,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899172806] [2022-11-18 20:39:21,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:39:21,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:21,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:21,803 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:21,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:39:22,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-18 20:39:22,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-18 20:39:22,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:22,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:39:22,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:39:22,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 20:39:23,291 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 [2022-11-18 20:39:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:23,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:23,432 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_924 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_924) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-18 20:39:23,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:23,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 20:39:23,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:39:23,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 20:39:23,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-18 20:39:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 152 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:39:24,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899172806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:24,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:24,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27, 22] total 47 [2022-11-18 20:39:24,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285272291] [2022-11-18 20:39:24,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:24,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 20:39:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 20:39:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1902, Unknown=1, NotChecked=88, Total=2162 [2022-11-18 20:39:24,021 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 47 states, 47 states have (on average 3.6382978723404253) internal successors, (171), 47 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:25,722 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-11-18 20:39:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 20:39:25,723 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6382978723404253) internal successors, (171), 47 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-18 20:39:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:25,723 INFO L225 Difference]: With dead ends: 166 [2022-11-18 20:39:25,724 INFO L226 Difference]: Without dead ends: 96 [2022-11-18 20:39:25,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=368, Invalid=4191, Unknown=1, NotChecked=132, Total=4692 [2022-11-18 20:39:25,725 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 185 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:25,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 654 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1575 Invalid, 0 Unknown, 94 Unchecked, 0.9s Time] [2022-11-18 20:39:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-18 20:39:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2022-11-18 20:39:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-11-18 20:39:25,728 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 88 [2022-11-18 20:39:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:25,728 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-11-18 20:39:25,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6382978723404253) internal successors, (171), 47 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-11-18 20:39:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-18 20:39:25,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:25,729 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:25,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:25,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:25,936 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:39:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -5445416, now seen corresponding path program 10 times [2022-11-18 20:39:25,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:25,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958827140] [2022-11-18 20:39:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:39:26,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:26,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958827140] [2022-11-18 20:39:26,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958827140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:26,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691480133] [2022-11-18 20:39:26,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:39:26,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:26,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:26,671 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:26,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:39:26,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:39:26,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:26,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 166 conjunts are in the unsatisfiable core [2022-11-18 20:39:26,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:27,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:40:33,056 INFO L321 Elim1Store]: treesize reduction 495, result has 22.3 percent of original size [2022-11-18 20:40:33,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 154 treesize of output 186 [2022-11-18 20:40:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 17 proven. 65 refuted. 59 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:40:33,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:40,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:40:40,116 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 581 treesize of output 541 [2022-11-18 20:40:40,289 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 431 treesize of output 387 [2022-11-18 20:40:40,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:40:40,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 30 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 239 treesize of output 499 [2022-11-18 20:41:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 96 proven. 45 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:41:03,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691480133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:03,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:41:03,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 47, 47] total 105 [2022-11-18 20:41:03,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000492615] [2022-11-18 20:41:03,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:03,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-18 20:41:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-18 20:41:03,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=10160, Unknown=76, NotChecked=0, Total=10920 [2022-11-18 20:41:03,375 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 105 states, 105 states have (on average 1.9428571428571428) internal successors, (204), 105 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:55,195 WARN L233 SmtUtils]: Spent 10.70s on a formula simplification. DAG size of input: 82 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:42:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:55,376 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2022-11-18 20:42:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-18 20:42:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9428571428571428) internal successors, (204), 105 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-18 20:42:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:55,378 INFO L225 Difference]: With dead ends: 148 [2022-11-18 20:42:55,378 INFO L226 Difference]: Without dead ends: 109 [2022-11-18 20:42:55,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5380 ImplicationChecksByTransitivity, 183.2s TimeCoverageRelationStatistics Valid=1470, Invalid=23508, Unknown=144, NotChecked=0, Total=25122 [2022-11-18 20:42:55,382 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:55,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 546 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1019 Invalid, 0 Unknown, 283 Unchecked, 0.9s Time] [2022-11-18 20:42:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-18 20:42:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-11-18 20:42:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-11-18 20:42:55,387 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 92 [2022-11-18 20:42:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:55,387 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-11-18 20:42:55,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9428571428571428) internal successors, (204), 105 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-11-18 20:42:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-18 20:42:55,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:55,389 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:55,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:55,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:55,597 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:42:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash -464220284, now seen corresponding path program 11 times [2022-11-18 20:42:55,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:42:55,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920377285] [2022-11-18 20:42:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:42:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:42:57,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:57,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920377285] [2022-11-18 20:42:57,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920377285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:57,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42516266] [2022-11-18 20:42:57,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:42:57,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:57,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:42:57,332 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:42:57,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:42:57,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:42:57,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:57,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-18 20:42:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:58,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:43:00,791 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-11-18 20:43:00,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-11-18 20:43:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:43:00,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:02,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:43:02,856 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 99 treesize of output 99 [2022-11-18 20:43:02,898 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 30 treesize of output 26 [2022-11-18 20:43:02,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:43:02,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2022-11-18 20:43:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:43:04,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42516266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:04,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:04,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31, 30] total 75 [2022-11-18 20:43:04,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446505232] [2022-11-18 20:43:04,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:04,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-18 20:43:04,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-18 20:43:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5316, Unknown=0, NotChecked=0, Total=5550 [2022-11-18 20:43:04,058 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 75 states, 75 states have (on average 3.1066666666666665) internal successors, (233), 75 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:09,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:09,579 INFO L93 Difference]: Finished difference Result 282 states and 287 transitions. [2022-11-18 20:43:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-18 20:43:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.1066666666666665) internal successors, (233), 75 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-18 20:43:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:09,582 INFO L225 Difference]: With dead ends: 282 [2022-11-18 20:43:09,582 INFO L226 Difference]: Without dead ends: 117 [2022-11-18 20:43:09,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=634, Invalid=13408, Unknown=0, NotChecked=0, Total=14042 [2022-11-18 20:43:09,585 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 178 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:09,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1227 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1776 Invalid, 0 Unknown, 421 Unchecked, 1.4s Time] [2022-11-18 20:43:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-18 20:43:09,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2022-11-18 20:43:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-11-18 20:43:09,590 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 102 [2022-11-18 20:43:09,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:09,591 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-11-18 20:43:09,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.1066666666666665) internal successors, (233), 75 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-11-18 20:43:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-18 20:43:09,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:09,593 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:09,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-18 20:43:09,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-18 20:43:09,802 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:43:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1427584898, now seen corresponding path program 12 times [2022-11-18 20:43:09,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:09,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492160566] [2022-11-18 20:43:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:09,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-18 20:43:11,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492160566] [2022-11-18 20:43:11,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492160566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094281141] [2022-11-18 20:43:11,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:43:11,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:11,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:11,145 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:11,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:43:12,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-18 20:43:12,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:12,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:43:12,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-18 20:43:13,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:14,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-18 20:43:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-18 20:43:14,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094281141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:14,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:14,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2022-11-18 20:43:14,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689519618] [2022-11-18 20:43:14,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:14,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:43:14,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:14,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:43:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:43:14,444 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 48 states, 47 states have (on average 4.553191489361702) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:15,788 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2022-11-18 20:43:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:43:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.553191489361702) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-11-18 20:43:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:15,789 INFO L225 Difference]: With dead ends: 120 [2022-11-18 20:43:15,789 INFO L226 Difference]: Without dead ends: 120 [2022-11-18 20:43:15,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 183 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 20:43:15,791 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 633 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:15,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 299 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:43:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-18 20:43:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-11-18 20:43:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-11-18 20:43:15,796 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 110 [2022-11-18 20:43:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:15,797 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-11-18 20:43:15,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.553191489361702) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-11-18 20:43:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-18 20:43:15,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:15,799 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:15,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:16,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-18 20:43:16,009 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:43:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:16,010 INFO L85 PathProgramCache]: Analyzing trace with hash -848897523, now seen corresponding path program 13 times [2022-11-18 20:43:16,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:16,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276307016] [2022-11-18 20:43:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:16,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 8 proven. 259 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-18 20:43:18,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:18,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276307016] [2022-11-18 20:43:18,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276307016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:18,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542936395] [2022-11-18 20:43:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:43:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:18,095 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:18,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:43:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 188 conjunts are in the unsatisfiable core [2022-11-18 20:43:18,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:19,566 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:43:22,340 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-11-18 20:43:22,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-11-18 20:43:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 8 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:22,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:24,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:43:24,999 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 99 treesize of output 99 [2022-11-18 20:43:25,009 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 30 treesize of output 26 [2022-11-18 20:43:25,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:43:25,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2022-11-18 20:43:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 8 proven. 259 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-18 20:43:26,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542936395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:26,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:26,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 41, 33] total 91 [2022-11-18 20:43:26,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874799143] [2022-11-18 20:43:26,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:26,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-18 20:43:26,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:26,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-18 20:43:26,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=7900, Unknown=0, NotChecked=0, Total=8190 [2022-11-18 20:43:26,318 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 91 states, 91 states have (on average 3.1538461538461537) internal successors, (287), 91 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:33,508 INFO L93 Difference]: Finished difference Result 318 states and 323 transitions. [2022-11-18 20:43:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-18 20:43:33,509 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.1538461538461537) internal successors, (287), 91 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-18 20:43:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:33,510 INFO L225 Difference]: With dead ends: 318 [2022-11-18 20:43:33,510 INFO L226 Difference]: Without dead ends: 131 [2022-11-18 20:43:33,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3256 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=746, Invalid=19276, Unknown=0, NotChecked=0, Total=20022 [2022-11-18 20:43:33,513 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 285 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 453 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:33,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1375 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2313 Invalid, 0 Unknown, 453 Unchecked, 1.7s Time] [2022-11-18 20:43:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-18 20:43:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2022-11-18 20:43:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-11-18 20:43:33,519 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 116 [2022-11-18 20:43:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:33,519 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-11-18 20:43:33,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.1538461538461537) internal successors, (287), 91 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-11-18 20:43:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-18 20:43:33,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:33,521 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:33,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:33,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-18 20:43:33,730 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:43:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:33,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2057778567, now seen corresponding path program 14 times [2022-11-18 20:43:33,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:33,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525110738] [2022-11-18 20:43:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:33,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 20:43:35,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:35,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525110738] [2022-11-18 20:43:35,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525110738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:35,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330304610] [2022-11-18 20:43:35,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:35,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:35,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:35,191 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:35,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:43:35,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:43:35,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 20:43:35,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 20:43:36,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:36,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:43:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 20:43:37,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330304610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:37,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:37,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 44 [2022-11-18 20:43:37,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335783097] [2022-11-18 20:43:37,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:37,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:43:37,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:43:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:43:37,362 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 45 states, 44 states have (on average 4.454545454545454) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:38,774 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2022-11-18 20:43:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:43:38,774 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.454545454545454) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-11-18 20:43:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:38,775 INFO L225 Difference]: With dead ends: 134 [2022-11-18 20:43:38,776 INFO L226 Difference]: Without dead ends: 134 [2022-11-18 20:43:38,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 215 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=616, Invalid=2690, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 20:43:38,777 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 493 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:38,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 542 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:43:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-18 20:43:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2022-11-18 20:43:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2022-11-18 20:43:38,783 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 124 [2022-11-18 20:43:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:38,783 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2022-11-18 20:43:38,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.454545454545454) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2022-11-18 20:43:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-18 20:43:38,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:38,785 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:38,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:38,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-18 20:43:38,994 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:43:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash 972528726, now seen corresponding path program 15 times [2022-11-18 20:43:38,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179898914] [2022-11-18 20:43:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:38,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 9 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 20:43:41,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179898914] [2022-11-18 20:43:41,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179898914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:41,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703098662] [2022-11-18 20:43:41,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:43:41,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:41,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:41,493 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:41,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:43:43,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-18 20:43:43,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:43,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 179 conjunts are in the unsatisfiable core [2022-11-18 20:43:43,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:43,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:43:46,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:43:46,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 20:43:49,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:43:49,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:43:49,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-18 20:43:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 9 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:49,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:49,705 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1375 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1375) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-18 20:43:49,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:43:49,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 20:43:49,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:43:49,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-18 20:43:49,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-18 20:43:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 9 proven. 365 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-18 20:43:51,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703098662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:51,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:51,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 45, 28] total 84 [2022-11-18 20:43:51,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583827432] [2022-11-18 20:43:51,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:51,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-18 20:43:51,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:51,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-18 20:43:51,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=6490, Unknown=1, NotChecked=162, Total=6972 [2022-11-18 20:43:51,368 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 84 states, 84 states have (on average 3.3095238095238093) internal successors, (278), 84 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:54,382 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-11-18 20:43:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-18 20:43:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.3095238095238093) internal successors, (278), 84 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-18 20:43:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:54,385 INFO L225 Difference]: With dead ends: 238 [2022-11-18 20:43:54,385 INFO L226 Difference]: Without dead ends: 138 [2022-11-18 20:43:54,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=544, Invalid=10171, Unknown=1, NotChecked=204, Total=10920 [2022-11-18 20:43:54,387 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 267 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 685 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:54,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1397 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1978 Invalid, 0 Unknown, 685 Unchecked, 1.4s Time] [2022-11-18 20:43:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-18 20:43:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2022-11-18 20:43:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-11-18 20:43:54,392 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2022-11-18 20:43:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:54,393 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-11-18 20:43:54,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.3095238095238093) internal successors, (278), 84 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-11-18 20:43:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 20:43:54,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:54,395 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:54,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:54,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:54,607 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 20:43:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1046422579, now seen corresponding path program 16 times [2022-11-18 20:43:54,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:54,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806570266] [2022-11-18 20:43:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:54,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 20:43:56,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:56,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806570266] [2022-11-18 20:43:56,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806570266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:56,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181810847] [2022-11-18 20:43:56,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:43:56,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:56,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:56,308 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:56,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32271527-df9a-4c19-bedd-3dfc5f42d502/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:43:56,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:43:56,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:56,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 242 conjunts are in the unsatisfiable core [2022-11-18 20:43:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:57,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:47:35,518 INFO L321 Elim1Store]: treesize reduction 1113, result has 16.5 percent of original size [2022-11-18 20:47:35,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 229 treesize of output 285 [2022-11-18 20:47:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 31 proven. 152 refuted. 162 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-18 20:47:35,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:53,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:53,029 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 875 treesize of output 811 [2022-11-18 20:47:53,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 650 treesize of output 582 [2022-11-18 20:47:54,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:54,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 72 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 81 case distinctions, treesize of input 359 treesize of output 1015 [2022-11-18 20:50:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 217 proven. 128 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-18 20:50:27,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181810847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:27,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:27,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 68, 68] total 153 [2022-11-18 20:50:27,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913713227] [2022-11-18 20:50:27,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:27,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-11-18 20:50:27,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-11-18 20:50:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=21670, Unknown=205, NotChecked=0, Total=23256 [2022-11-18 20:50:27,882 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 153 states, 153 states have (on average 1.9215686274509804) internal successors, (294), 153 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:16,521 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)