./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrncpy_reverse_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrncpy_reverse_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN --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 64bit --witnessprinter.graph.data.programhash 3c4d1f74b81dbb287c4425592070f3cc0de08845db85b6da85a8a6e68f14746e --- 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-6b4ec56 [2022-11-20 10:31:05,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:31:05,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:31:05,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:31:05,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:31:05,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:31:05,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:31:05,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:31:05,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:31:05,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:31:05,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:31:05,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:31:05,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:31:05,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:31:05,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:31:05,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:31:05,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:31:05,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:31:05,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:31:05,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:31:05,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:31:05,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:31:05,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:31:05,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:31:05,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:31:05,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:31:05,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:31:05,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:31:05,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:31:05,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:31:05,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:31:05,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:31:05,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:31:05,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:31:05,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:31:05,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:31:05,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:31:05,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:31:05,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:31:05,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:31:05,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:31:05,638 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-20 10:31:05,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:31:05,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:31:05,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:31:05,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:31:05,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:31:05,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:31:05,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:31:05,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:31:05,668 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:31:05,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:31:05,668 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:31:05,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:31:05,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:31:05,669 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:31:05,669 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:31:05,669 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:31:05,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:31:05,670 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:31:05,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:31:05,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:31:05,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:31:05,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:31:05,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:31:05,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:31:05,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:31:05,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:31:05,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:31:05,672 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_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c4d1f74b81dbb287c4425592070f3cc0de08845db85b6da85a8a6e68f14746e [2022-11-20 10:31:05,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:31:06,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:31:06,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:31:06,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:31:06,030 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:31:06,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/termination-15/cstrncpy_reverse_alloca.i [2022-11-20 10:31:09,135 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:31:09,431 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:31:09,431 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/sv-benchmarks/c/termination-15/cstrncpy_reverse_alloca.i [2022-11-20 10:31:09,447 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/data/3501b9f17/cedd239acc5047e981bff0e376ce953d/FLAGede5bc99b [2022-11-20 10:31:09,463 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/data/3501b9f17/cedd239acc5047e981bff0e376ce953d [2022-11-20 10:31:09,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:31:09,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:31:09,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:09,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:31:09,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:31:09,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:09,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104ffe3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09, skipping insertion in model container [2022-11-20 10:31:09,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:09,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:31:09,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:31:09,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:09,892 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:31:09,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:09,995 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:31:09,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09 WrapperNode [2022-11-20 10:31:09,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:09,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:31:09,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:31:09,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:31:10,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,064 INFO L138 Inliner]: procedures = 152, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2022-11-20 10:31:10,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:31:10,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:31:10,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:31:10,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:31:10,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,117 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:31:10,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:31:10,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:31:10,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:31:10,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (1/1) ... [2022-11-20 10:31:10,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:31:10,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:10,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:31:10,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:31:10,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:31:10,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:31:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:31:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:31:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:31:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:31:10,379 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:31:10,381 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:31:10,690 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:31:10,696 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:31:10,697 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:31:10,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:31:10 BoogieIcfgContainer [2022-11-20 10:31:10,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:31:10,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:31:10,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:31:10,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:31:10,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:31:09" (1/3) ... [2022-11-20 10:31:10,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b76ad47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:31:10, skipping insertion in model container [2022-11-20 10:31:10,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:09" (2/3) ... [2022-11-20 10:31:10,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b76ad47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:31:10, skipping insertion in model container [2022-11-20 10:31:10,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:31:10" (3/3) ... [2022-11-20 10:31:10,712 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncpy_reverse_alloca.i [2022-11-20 10:31:10,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:31:10,736 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-20 10:31:10,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:31:10,808 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;@7ecd1464, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:31:10,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-20 10:31:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:10,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:31:10,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:10,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:31:10,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:10,844 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2022-11-20 10:31:10,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:10,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015072386] [2022-11-20 10:31:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:11,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:11,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015072386] [2022-11-20 10:31:11,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015072386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:11,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:11,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:31:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306525666] [2022-11-20 10:31:11,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:11,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:31:11,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:31:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:31:11,324 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:11,397 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-20 10:31:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:31:11,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:31:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:11,410 INFO L225 Difference]: With dead ends: 28 [2022-11-20 10:31:11,410 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 10:31:11,413 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 [2022-11-20 10:31:11,417 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:11,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 10:31:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-20 10:31:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-20 10:31:11,453 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 6 [2022-11-20 10:31:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:11,454 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-20 10:31:11,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-20 10:31:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:31:11,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:11,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:31:11,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:31:11,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2022-11-20 10:31:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:11,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103600786] [2022-11-20 10:31:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:11,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:11,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:11,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103600786] [2022-11-20 10:31:11,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103600786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:11,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:11,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:31:11,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894041702] [2022-11-20 10:31:11,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:11,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:31:11,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:11,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:31:11,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:31:11,697 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:11,760 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-11-20 10:31:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:31:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:31:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:11,765 INFO L225 Difference]: With dead ends: 48 [2022-11-20 10:31:11,765 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 10:31:11,767 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 [2022-11-20 10:31:11,768 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:11,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 71 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:31:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 10:31:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2022-11-20 10:31:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.619047619047619) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-20 10:31:11,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 6 [2022-11-20 10:31:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:11,774 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-20 10:31:11,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-20 10:31:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:31:11,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:11,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:31:11,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:31:11,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:11,781 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2022-11-20 10:31:11,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:11,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110650778] [2022-11-20 10:31:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:11,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:11,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110650778] [2022-11-20 10:31:11,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110650778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:11,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:11,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:31:11,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816602838] [2022-11-20 10:31:11,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:11,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:31:11,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:31:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:31:11,971 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:12,045 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-20 10:31:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:31:12,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:31:12,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:12,047 INFO L225 Difference]: With dead ends: 28 [2022-11-20 10:31:12,048 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 10:31:12,048 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 [2022-11-20 10:31:12,050 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:12,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:31:12,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 10:31:12,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-11-20 10:31:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-20 10:31:12,064 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 6 [2022-11-20 10:31:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:12,065 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-20 10:31:12,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-20 10:31:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:31:12,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:12,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:12,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:31:12,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:12,072 INFO L85 PathProgramCache]: Analyzing trace with hash -534039733, now seen corresponding path program 1 times [2022-11-20 10:31:12,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:12,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900955902] [2022-11-20 10:31:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:12,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:12,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900955902] [2022-11-20 10:31:12,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900955902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:12,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:12,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:31:12,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553005555] [2022-11-20 10:31:12,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:12,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:31:12,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:12,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:31:12,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:31:12,251 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2022-11-20 10:31:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:12,326 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-20 10:31:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:31:12,327 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 [2022-11-20 10:31:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:12,328 INFO L225 Difference]: With dead ends: 24 [2022-11-20 10:31:12,328 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 10:31:12,329 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 [2022-11-20 10:31:12,330 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:12,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 37 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:31:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 10:31:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-20 10:31:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 23 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) [2022-11-20 10:31:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-20 10:31:12,336 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2022-11-20 10:31:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:12,336 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-20 10:31:12,337 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) [2022-11-20 10:31:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-20 10:31:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:31:12,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:12,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:12,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:31:12,339 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:12,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:12,339 INFO L85 PathProgramCache]: Analyzing trace with hash -534039732, now seen corresponding path program 1 times [2022-11-20 10:31:12,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:12,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295500850] [2022-11-20 10:31:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:12,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:12,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:12,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295500850] [2022-11-20 10:31:12,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295500850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:12,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:12,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:31:12,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588950152] [2022-11-20 10:31:12,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:31:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:31:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:31:12,676 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 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) [2022-11-20 10:31:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:12,812 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-11-20 10:31:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:31:12,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 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 [2022-11-20 10:31:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:12,814 INFO L225 Difference]: With dead ends: 51 [2022-11-20 10:31:12,815 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 10:31:12,815 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 [2022-11-20 10:31:12,816 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:12,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 95 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 10:31:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-11-20 10:31:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.5) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-20 10:31:12,822 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 9 [2022-11-20 10:31:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:12,823 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-20 10:31:12,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 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) [2022-11-20 10:31:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-20 10:31:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:31:12,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:12,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:12,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:31:12,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:12,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1240967630, now seen corresponding path program 1 times [2022-11-20 10:31:12,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:12,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049231474] [2022-11-20 10:31:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:13,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:13,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049231474] [2022-11-20 10:31:13,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049231474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:13,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:13,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:31:13,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047421841] [2022-11-20 10:31:13,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:13,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:31:13,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:13,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:31:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:31:13,115 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 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) [2022-11-20 10:31:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:13,230 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-11-20 10:31:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:31:13,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 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 [2022-11-20 10:31:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:13,231 INFO L225 Difference]: With dead ends: 36 [2022-11-20 10:31:13,232 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 10:31:13,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:31:13,234 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:13,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 63 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 10:31:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-11-20 10:31:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.55) internal successors, (31), 25 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) [2022-11-20 10:31:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-20 10:31:13,245 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 9 [2022-11-20 10:31:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:13,246 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-20 10:31:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 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) [2022-11-20 10:31:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-20 10:31:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:31:13,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:13,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:13,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:31:13,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:13,249 INFO L85 PathProgramCache]: Analyzing trace with hash 624637463, now seen corresponding path program 1 times [2022-11-20 10:31:13,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:13,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199946891] [2022-11-20 10:31:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:13,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:13,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:13,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199946891] [2022-11-20 10:31:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199946891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:13,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:13,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:31:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000342480] [2022-11-20 10:31:13,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:13,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:31:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:31:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:31:13,467 INFO L87 Difference]: Start difference. First operand 26 states and 31 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) [2022-11-20 10:31:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:13,534 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-20 10:31:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:31:13,535 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 [2022-11-20 10:31:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:13,536 INFO L225 Difference]: With dead ends: 25 [2022-11-20 10:31:13,536 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 10:31:13,536 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 [2022-11-20 10:31:13,537 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:13,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 36 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:31:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 10:31:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 10:31:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-20 10:31:13,548 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 10 [2022-11-20 10:31:13,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:13,548 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-20 10:31:13,548 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) [2022-11-20 10:31:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-20 10:31:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:31:13,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:13,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:13,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:31:13,550 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash 624637464, now seen corresponding path program 1 times [2022-11-20 10:31:13,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:13,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914444949] [2022-11-20 10:31:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:13,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:13,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:13,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914444949] [2022-11-20 10:31:13,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914444949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:13,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:13,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:31:13,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889333791] [2022-11-20 10:31:13,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:31:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:13,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:31:13,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:31:13,834 INFO L87 Difference]: Start difference. First operand 25 states and 30 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) [2022-11-20 10:31:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:13,946 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-11-20 10:31:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:31:13,947 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 [2022-11-20 10:31:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:13,948 INFO L225 Difference]: With dead ends: 51 [2022-11-20 10:31:13,948 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 10:31:13,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:31:13,949 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:13,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 93 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 10:31:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2022-11-20 10:31:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-20 10:31:13,953 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 10 [2022-11-20 10:31:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:13,953 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-20 10:31:13,953 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) [2022-11-20 10:31:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-20 10:31:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:31:13,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:13,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:13,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:31:13,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:13,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1895322470, now seen corresponding path program 1 times [2022-11-20 10:31:13,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:13,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060763061] [2022-11-20 10:31:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:13,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:14,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:14,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060763061] [2022-11-20 10:31:14,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060763061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:14,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:14,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:31:14,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831831213] [2022-11-20 10:31:14,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:14,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:31:14,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:31:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:31:14,185 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2022-11-20 10:31:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:14,286 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-11-20 10:31:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:31:14,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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 [2022-11-20 10:31:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:14,288 INFO L225 Difference]: With dead ends: 36 [2022-11-20 10:31:14,288 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 10:31:14,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:31:14,293 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:14,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 60 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 10:31:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-11-20 10:31:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 25 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) [2022-11-20 10:31:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-20 10:31:14,304 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 10 [2022-11-20 10:31:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:14,304 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-20 10:31:14,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2022-11-20 10:31:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-20 10:31:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:31:14,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:14,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:14,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:31:14,311 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2111103955, now seen corresponding path program 1 times [2022-11-20 10:31:14,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:14,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775585397] [2022-11-20 10:31:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:14,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:14,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:14,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775585397] [2022-11-20 10:31:14,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775585397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:14,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:14,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:31:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493679982] [2022-11-20 10:31:14,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:14,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:31:14,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:14,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:31:14,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:31:14,397 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:14,420 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-20 10:31:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:31:14,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:31:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:14,421 INFO L225 Difference]: With dead ends: 26 [2022-11-20 10:31:14,422 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 10:31:14,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:31:14,423 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:14,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 49 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:31:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 10:31:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-20 10:31:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-20 10:31:14,439 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2022-11-20 10:31:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:14,439 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-20 10:31:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-20 10:31:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:31:14,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:14,441 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:14,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:31:14,442 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:14,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1518608411, now seen corresponding path program 1 times [2022-11-20 10:31:14,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:14,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981897052] [2022-11-20 10:31:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:14,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:14,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:14,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981897052] [2022-11-20 10:31:14,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981897052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:14,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:14,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:31:14,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979432742] [2022-11-20 10:31:14,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:14,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:31:14,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:31:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:31:14,564 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:14,605 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-11-20 10:31:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:31:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:31:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:14,608 INFO L225 Difference]: With dead ends: 48 [2022-11-20 10:31:14,609 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 10:31:14,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:31:14,610 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:14,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 88 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:31:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 10:31:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-11-20 10:31:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-20 10:31:14,620 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 13 [2022-11-20 10:31:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:14,621 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-20 10:31:14,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-20 10:31:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:31:14,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:14,623 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:14,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:31:14,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:14,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1911635421, now seen corresponding path program 1 times [2022-11-20 10:31:14,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:14,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852537678] [2022-11-20 10:31:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:14,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:14,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:14,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852537678] [2022-11-20 10:31:14,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852537678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:14,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:14,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 10:31:14,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982951260] [2022-11-20 10:31:14,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:14,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:31:14,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:31:14,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:31:14,921 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:15,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:15,023 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-20 10:31:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:31:15,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:31:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:15,025 INFO L225 Difference]: With dead ends: 59 [2022-11-20 10:31:15,025 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 10:31:15,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:31:15,026 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:15,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 111 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 10:31:15,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2022-11-20 10:31:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-20 10:31:15,035 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 13 [2022-11-20 10:31:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:15,035 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-20 10:31:15,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-20 10:31:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:31:15,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:15,038 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:15,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:31:15,038 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:15,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1210570843, now seen corresponding path program 1 times [2022-11-20 10:31:15,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:15,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443740704] [2022-11-20 10:31:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:15,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:15,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:15,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443740704] [2022-11-20 10:31:15,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443740704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:15,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192603060] [2022-11-20 10:31:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:15,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:15,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:15,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:31:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:15,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 10:31:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:15,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:31:15,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:15,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-20 10:31:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:16,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:16,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:16,159 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 20 treesize of output 24 [2022-11-20 10:31:16,377 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 12 treesize of output 10 [2022-11-20 10:31:16,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-20 10:31:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:16,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192603060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:16,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:16,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-11-20 10:31:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248550547] [2022-11-20 10:31:16,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:16,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:31:16,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:16,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:31:16,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:31:16,408 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 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) [2022-11-20 10:31:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:16,524 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-11-20 10:31:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:31:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 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 13 [2022-11-20 10:31:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:16,526 INFO L225 Difference]: With dead ends: 52 [2022-11-20 10:31:16,527 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 10:31:16,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:31:16,528 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:16,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 167 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-20 10:31:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 10:31:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-11-20 10:31:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-11-20 10:31:16,538 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 13 [2022-11-20 10:31:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:16,539 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-11-20 10:31:16,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 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) [2022-11-20 10:31:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-11-20 10:31:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:31:16,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:16,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:16,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:16,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:16,748 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash 167227485, now seen corresponding path program 1 times [2022-11-20 10:31:16,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:16,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213380840] [2022-11-20 10:31:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:16,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:16,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:16,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213380840] [2022-11-20 10:31:16,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213380840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:16,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:16,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:31:16,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160232237] [2022-11-20 10:31:16,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:16,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:31:16,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:16,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:31:16,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:31:16,848 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:16,929 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-11-20 10:31:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:31:16,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:31:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:16,930 INFO L225 Difference]: With dead ends: 46 [2022-11-20 10:31:16,930 INFO L226 Difference]: Without dead ends: 46 [2022-11-20 10:31:16,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:31:16,931 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:16,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 60 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-20 10:31:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-11-20 10:31:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.3) internal successors, (52), 43 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) [2022-11-20 10:31:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-11-20 10:31:16,935 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 14 [2022-11-20 10:31:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:16,935 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-11-20 10:31:16,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-11-20 10:31:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:31:16,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:16,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:16,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 10:31:16,937 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash 167227486, now seen corresponding path program 1 times [2022-11-20 10:31:16,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:16,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536354154] [2022-11-20 10:31:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:16,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:17,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:17,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536354154] [2022-11-20 10:31:17,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536354154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:17,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:17,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:31:17,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545671010] [2022-11-20 10:31:17,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:17,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:31:17,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:31:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:31:17,068 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.0) 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) [2022-11-20 10:31:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:17,170 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-11-20 10:31:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:31:17,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) 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 [2022-11-20 10:31:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:17,172 INFO L225 Difference]: With dead ends: 57 [2022-11-20 10:31:17,172 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 10:31:17,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:31:17,174 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:17,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 117 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:31:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 10:31:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2022-11-20 10:31:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.2448979591836735) 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) [2022-11-20 10:31:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-20 10:31:17,178 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 14 [2022-11-20 10:31:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:17,178 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-20 10:31:17,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) 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) [2022-11-20 10:31:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-20 10:31:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:31:17,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:17,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 10:31:17,181 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash 868292064, now seen corresponding path program 1 times [2022-11-20 10:31:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:17,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187268686] [2022-11-20 10:31:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:17,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:17,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187268686] [2022-11-20 10:31:17,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187268686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:17,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:17,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 10:31:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259368029] [2022-11-20 10:31:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:17,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:31:17,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:31:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:31:17,556 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2022-11-20 10:31:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:17,879 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-11-20 10:31:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:31:17,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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 [2022-11-20 10:31:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:17,881 INFO L225 Difference]: With dead ends: 57 [2022-11-20 10:31:17,881 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 10:31:17,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:31:17,882 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:17,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 87 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 10:31:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-11-20 10:31:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.25) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-11-20 10:31:17,884 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 14 [2022-11-20 10:31:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:17,885 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-11-20 10:31:17,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2022-11-20 10:31:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-11-20 10:31:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:31:17,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:17,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:17,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 10:31:17,886 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1127009503, now seen corresponding path program 1 times [2022-11-20 10:31:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:17,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588889527] [2022-11-20 10:31:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:18,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588889527] [2022-11-20 10:31:18,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588889527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:18,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023066090] [2022-11-20 10:31:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:18,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:18,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:18,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:18,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:31:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 10:31:18,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:18,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:18,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:18,375 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 20 treesize of output 24 [2022-11-20 10:31:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:18,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023066090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:18,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:18,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 10:31:18,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816344453] [2022-11-20 10:31:18,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:18,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:31:18,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:18,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:31:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:31:18,468 INFO L87 Difference]: Start difference. First operand 56 states and 65 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) [2022-11-20 10:31:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:18,631 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-11-20 10:31:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:31:18,632 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 14 [2022-11-20 10:31:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:18,632 INFO L225 Difference]: With dead ends: 59 [2022-11-20 10:31:18,632 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 10:31:18,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:31:18,633 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:18,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 110 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 10:31:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-11-20 10:31:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 54 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) [2022-11-20 10:31:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-20 10:31:18,636 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 14 [2022-11-20 10:31:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:18,636 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-20 10:31:18,636 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) [2022-11-20 10:31:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-20 10:31:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:31:18,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:18,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:18,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:18,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:31:18,843 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash 319361928, now seen corresponding path program 1 times [2022-11-20 10:31:18,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:18,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270103820] [2022-11-20 10:31:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:18,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:18,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:18,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270103820] [2022-11-20 10:31:18,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270103820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:18,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:18,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:31:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993793170] [2022-11-20 10:31:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:18,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:31:18,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:31:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:31:18,966 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:18,983 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-11-20 10:31:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:31:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:31:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:18,984 INFO L225 Difference]: With dead ends: 54 [2022-11-20 10:31:18,984 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 10:31:18,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:31:18,985 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:18,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:31:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 10:31:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-20 10:31:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.15625) internal successors, (37), 33 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) [2022-11-20 10:31:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-11-20 10:31:18,988 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 15 [2022-11-20 10:31:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:18,988 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-11-20 10:31:18,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-11-20 10:31:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 10:31:18,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:18,990 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:18,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 10:31:18,990 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:18,991 INFO L85 PathProgramCache]: Analyzing trace with hash 980746174, now seen corresponding path program 2 times [2022-11-20 10:31:18,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:18,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856678748] [2022-11-20 10:31:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:19,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:19,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856678748] [2022-11-20 10:31:19,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856678748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706095088] [2022-11-20 10:31:19,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:31:19,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:19,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:19,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:19,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:31:19,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:31:19,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:31:19,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 10:31:19,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:19,720 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 10:31:19,721 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 [2022-11-20 10:31:19,729 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 [2022-11-20 10:31:19,766 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 11 treesize of output 7 [2022-11-20 10:31:20,026 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 23 treesize of output 23 [2022-11-20 10:31:20,292 INFO L321 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2022-11-20 10:31:20,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 27 [2022-11-20 10:31:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:20,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:21,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:21,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:31:21,127 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 35 treesize of output 31 [2022-11-20 10:31:21,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-20 10:31:21,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:31:21,261 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 [2022-11-20 10:31:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:21,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706095088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:21,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:21,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-11-20 10:31:21,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395332248] [2022-11-20 10:31:21,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:21,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:31:21,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:31:21,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=954, Unknown=3, NotChecked=0, Total=1056 [2022-11-20 10:31:21,286 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 33 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) [2022-11-20 10:31:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:21,716 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-20 10:31:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:31:21,717 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.34375) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 10:31:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:21,718 INFO L225 Difference]: With dead ends: 40 [2022-11-20 10:31:21,718 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 10:31:21,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=1404, Unknown=3, NotChecked=0, Total=1560 [2022-11-20 10:31:21,720 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:21,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 241 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 173 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-11-20 10:31:21,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 10:31:21,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-11-20 10:31:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 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) [2022-11-20 10:31:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-20 10:31:21,723 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 17 [2022-11-20 10:31:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:21,724 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-20 10:31:21,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.34375) internal successors, (43), 33 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) [2022-11-20 10:31:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-20 10:31:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 10:31:21,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:21,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:21,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:21,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:21,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:21,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:21,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1619080872, now seen corresponding path program 1 times [2022-11-20 10:31:21,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:21,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503907383] [2022-11-20 10:31:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:21,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:22,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503907383] [2022-11-20 10:31:22,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503907383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020128095] [2022-11-20 10:31:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:22,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:22,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:22,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:22,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:31:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:22,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 10:31:22,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:22,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:23,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:23,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-11-20 10:31:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:23,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020128095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:23,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:23,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-20 10:31:23,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534120226] [2022-11-20 10:31:23,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:23,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:31:23,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:31:23,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:31:23,221 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 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) [2022-11-20 10:31:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:23,735 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-11-20 10:31:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:31:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 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 18 [2022-11-20 10:31:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:23,736 INFO L225 Difference]: With dead ends: 38 [2022-11-20 10:31:23,736 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 10:31:23,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:31:23,738 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:23,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 101 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:31:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 10:31:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-20 10:31:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-11-20 10:31:23,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 18 [2022-11-20 10:31:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:23,740 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-11-20 10:31:23,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 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) [2022-11-20 10:31:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-11-20 10:31:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 10:31:23,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:23,741 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:23,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:23,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:23,948 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:31:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash -196730025, now seen corresponding path program 3 times [2022-11-20 10:31:23,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:23,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852521961] [2022-11-20 10:31:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:23,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:24,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:24,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852521961] [2022-11-20 10:31:24,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852521961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:24,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048905216] [2022-11-20 10:31:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:31:24,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:24,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:24,703 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:24,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:31:24,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:31:24,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:31:24,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 10:31:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:24,815 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 [2022-11-20 10:31:24,822 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 [2022-11-20 10:31:24,846 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 11 treesize of output 7 [2022-11-20 10:31:24,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:31:24,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:31:25,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:25,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-20 10:31:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:25,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:25,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:25,782 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 18 treesize of output 19 [2022-11-20 10:31:25,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:25,791 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 30 treesize of output 30 [2022-11-20 10:31:25,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 10:31:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:25,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048905216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:25,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:25,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 33 [2022-11-20 10:31:25,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285118928] [2022-11-20 10:31:25,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:25,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 10:31:25,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 10:31:25,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=976, Unknown=3, NotChecked=0, Total=1122 [2022-11-20 10:31:25,878 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 34 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 34 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) [2022-11-20 10:31:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:26,758 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-11-20 10:31:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:31:26,759 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 34 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) Word has length 21 [2022-11-20 10:31:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:26,759 INFO L225 Difference]: With dead ends: 23 [2022-11-20 10:31:26,759 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 10:31:26,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=373, Invalid=1604, Unknown=3, NotChecked=0, Total=1980 [2022-11-20 10:31:26,761 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:26,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 96 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 209 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 10:31:26,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 10:31:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 10:31:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 10:31:26,762 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2022-11-20 10:31:26,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:26,763 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 10:31:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 34 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) [2022-11-20 10:31:26,763 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 10:31:26,763 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 10:31:26,766 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-11-20 10:31:26,766 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-11-20 10:31:26,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-20 10:31:26,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-20 10:31:26,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-20 10:31:26,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-11-20 10:31:26,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-11-20 10:31:26,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-11-20 10:31:26,768 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-20 10:31:26,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:26,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:26,977 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:26,979 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 10:31:26,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:31:26 BoogieIcfgContainer [2022-11-20 10:31:26,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 10:31:26,983 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 10:31:26,983 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 10:31:26,983 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 10:31:26,984 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:31:10" (3/4) ... [2022-11-20 10:31:26,987 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-20 10:31:27,002 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-11-20 10:31:27,002 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-20 10:31:27,002 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-20 10:31:27,003 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-20 10:31:27,041 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 10:31:27,041 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 10:31:27,042 INFO L158 Benchmark]: Toolchain (without parser) took 17574.56ms. Allocated memory was 151.0MB in the beginning and 299.9MB in the end (delta: 148.9MB). Free memory was 116.2MB in the beginning and 145.3MB in the end (delta: -29.2MB). Peak memory consumption was 121.2MB. Max. memory is 16.1GB. [2022-11-20 10:31:27,042 INFO L158 Benchmark]: CDTParser took 1.53ms. Allocated memory is still 151.0MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:31:27,043 INFO L158 Benchmark]: CACSL2BoogieTranslator took 525.30ms. Allocated memory is still 151.0MB. Free memory was 115.8MB in the beginning and 98.2MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-20 10:31:27,043 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.18ms. Allocated memory is still 151.0MB. Free memory was 98.2MB in the beginning and 96.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:31:27,043 INFO L158 Benchmark]: Boogie Preprocessor took 60.67ms. Allocated memory is still 151.0MB. Free memory was 96.5MB in the beginning and 94.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:31:27,044 INFO L158 Benchmark]: RCFGBuilder took 573.96ms. Allocated memory is still 151.0MB. Free memory was 94.8MB in the beginning and 82.1MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 10:31:27,044 INFO L158 Benchmark]: TraceAbstraction took 16277.48ms. Allocated memory was 151.0MB in the beginning and 299.9MB in the end (delta: 148.9MB). Free memory was 81.3MB in the beginning and 147.4MB in the end (delta: -66.1MB). Peak memory consumption was 85.5MB. Max. memory is 16.1GB. [2022-11-20 10:31:27,044 INFO L158 Benchmark]: Witness Printer took 58.62ms. Allocated memory is still 299.9MB. Free memory was 147.4MB in the beginning and 145.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:31:27,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.53ms. Allocated memory is still 151.0MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 525.30ms. Allocated memory is still 151.0MB. Free memory was 115.8MB in the beginning and 98.2MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.18ms. Allocated memory is still 151.0MB. Free memory was 98.2MB in the beginning and 96.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.67ms. Allocated memory is still 151.0MB. Free memory was 96.5MB in the beginning and 94.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 573.96ms. Allocated memory is still 151.0MB. Free memory was 94.8MB in the beginning and 82.1MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 16277.48ms. Allocated memory was 151.0MB in the beginning and 299.9MB in the end (delta: 148.9MB). Free memory was 81.3MB in the beginning and 147.4MB in the end (delta: -66.1MB). Peak memory consumption was 85.5MB. Max. memory is 16.1GB. * Witness Printer took 58.62ms. Allocated memory is still 299.9MB. Free memory was 147.4MB in the beginning and 145.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 382]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 16.2s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 752 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 752 mSDsluCounter, 1786 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 187 IncrementalHoareTripleChecker+Unchecked, 1394 mSDsCounter, 69 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1322 IncrementalHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 69 mSolverCounterUnsat, 392 mSDtfsCounter, 1322 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 356 GetRequests, 107 SyntacticMatches, 7 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=16, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 134 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 335 NumberOfCodeBlocks, 335 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 387 ConstructedInterpolants, 24 QuantifiedInterpolants, 3868 SizeOfPredicates, 87 NumberOfNonLiveVariables, 863 ConjunctsInSsa, 263 ConjunctsInUnsatCore, 31 InterpolantComputations, 16 PerfectInterpolantSequences, 11/107 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-20 10:31:27,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef4f7c25-5714-45cd-9f30-ee1571d8b1c8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE