./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:30:10,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:30:10,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:30:10,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:30:10,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:30:10,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:30:10,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:30:10,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:30:10,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:30:10,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:30:10,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:30:10,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:30:10,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:30:10,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:30:10,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:30:10,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:30:10,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:30:10,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:30:10,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:30:10,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:30:10,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:30:10,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:30:10,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:30:10,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:30:10,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:30:10,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:30:10,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:30:10,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:30:10,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:30:10,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:30:10,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:30:10,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:30:10,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:30:10,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:30:10,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:30:10,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:30:10,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:30:10,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:30:10,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:30:10,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:30:10,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:30:10,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 18:30:10,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:30:10,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:30:10,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:30:10,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:30:10,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:30:10,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:30:10,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:30:10,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:30:10,714 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:30:10,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:30:10,716 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:30:10,716 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:30:10,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:30:10,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:30:10,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:30:10,717 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 18:30:10,718 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 18:30:10,718 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 18:30:10,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:30:10,719 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:30:10,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:30:10,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:30:10,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:30:10,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:30:10,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:30:10,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:30:10,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:30:10,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:30:10,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:30:10,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:30:10,722 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_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2022-11-18 18:30:11,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:30:11,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:30:11,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:30:11,060 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:30:11,061 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:30:11,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2022-11-18 18:30:11,150 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/data/94ed409c0/37f38ef9c8c94348be22d461267dbffe/FLAG1b0a52a28 [2022-11-18 18:30:11,623 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:30:11,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2022-11-18 18:30:11,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/data/94ed409c0/37f38ef9c8c94348be22d461267dbffe/FLAG1b0a52a28 [2022-11-18 18:30:11,999 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/data/94ed409c0/37f38ef9c8c94348be22d461267dbffe [2022-11-18 18:30:12,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:30:12,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:30:12,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:30:12,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:30:12,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:30:12,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@311f1a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12, skipping insertion in model container [2022-11-18 18:30:12,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:30:12,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:30:12,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:30:12,290 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:30:12,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:30:12,320 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:30:12,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12 WrapperNode [2022-11-18 18:30:12,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:30:12,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:30:12,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:30:12,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:30:12,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,356 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-18 18:30:12,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:30:12,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:30:12,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:30:12,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:30:12,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,379 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:30:12,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:30:12,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:30:12,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:30:12,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (1/1) ... [2022-11-18 18:30:12,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:30:12,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:12,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:30:12,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:30:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:30:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:30:12,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:30:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:30:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:30:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:30:12,549 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:30:12,551 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:30:12,732 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:30:12,745 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:30:12,746 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 18:30:12,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:30:12 BoogieIcfgContainer [2022-11-18 18:30:12,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:30:12,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:30:12,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:30:12,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:30:12,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:30:12" (1/3) ... [2022-11-18 18:30:12,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f79ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:30:12, skipping insertion in model container [2022-11-18 18:30:12,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:12" (2/3) ... [2022-11-18 18:30:12,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f79ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:30:12, skipping insertion in model container [2022-11-18 18:30:12,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:30:12" (3/3) ... [2022-11-18 18:30:12,760 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2022-11-18 18:30:12,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:30:12,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-18 18:30:12,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:30:12,841 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;@169b36c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:30:12,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-18 18:30:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 18:30:12,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:12,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 18:30:12,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:12,859 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-11-18 18:30:12,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:12,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107814265] [2022-11-18 18:30:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:12,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:13,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:13,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107814265] [2022-11-18 18:30:13,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107814265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:13,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:13,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:30:13,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918781732] [2022-11-18 18:30:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:13,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:30:13,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:13,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:30:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:13,244 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:13,341 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-18 18:30:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:30:13,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 18:30:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:13,353 INFO L225 Difference]: With dead ends: 59 [2022-11-18 18:30:13,353 INFO L226 Difference]: Without dead ends: 55 [2022-11-18 18:30:13,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:13,359 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:13,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:30:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-18 18:30:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-11-18 18:30:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-18 18:30:13,395 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-11-18 18:30:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:13,396 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-18 18:30:13,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-18 18:30:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:30:13,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:13,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:30:13,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:30:13,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-11-18 18:30:13,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:13,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208156143] [2022-11-18 18:30:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:13,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:13,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:13,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208156143] [2022-11-18 18:30:13,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208156143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:13,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:13,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:30:13,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815812638] [2022-11-18 18:30:13,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:13,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:30:13,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:13,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:30:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:13,480 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:13,524 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-11-18 18:30:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:30:13,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 18:30:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:13,526 INFO L225 Difference]: With dead ends: 58 [2022-11-18 18:30:13,527 INFO L226 Difference]: Without dead ends: 58 [2022-11-18 18:30:13,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:13,529 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:13,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:30:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-18 18:30:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-11-18 18:30:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-18 18:30:13,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-11-18 18:30:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:13,537 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-18 18:30:13,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:13,537 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-18 18:30:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:30:13,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:13,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:30:13,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:30:13,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-11-18 18:30:13,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:13,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36648082] [2022-11-18 18:30:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:13,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:13,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36648082] [2022-11-18 18:30:13,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36648082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:13,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:13,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:30:13,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007619111] [2022-11-18 18:30:13,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:13,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:30:13,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:30:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:30:13,667 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:13,742 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-18 18:30:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:30:13,743 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 [2022-11-18 18:30:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:13,746 INFO L225 Difference]: With dead ends: 32 [2022-11-18 18:30:13,746 INFO L226 Difference]: Without dead ends: 32 [2022-11-18 18:30:13,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:30:13,754 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:13,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:30:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-18 18:30:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-18 18:30:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-18 18:30:13,767 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-11-18 18:30:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:13,768 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-18 18:30:13,769 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) [2022-11-18 18:30:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-18 18:30:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:30:13,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:13,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:30:13,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:30:13,771 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-11-18 18:30:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:13,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498155710] [2022-11-18 18:30:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:14,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498155710] [2022-11-18 18:30:14,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498155710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:14,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:14,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:30:14,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565265041] [2022-11-18 18:30:14,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:14,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:30:14,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:14,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:30:14,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:30:14,065 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:14,198 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-11-18 18:30:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:30:14,199 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 [2022-11-18 18:30:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:14,202 INFO L225 Difference]: With dead ends: 55 [2022-11-18 18:30:14,203 INFO L226 Difference]: Without dead ends: 55 [2022-11-18 18:30:14,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:30:14,207 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:14,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:30:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-18 18:30:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-11-18 18:30:14,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:14,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-18 18:30:14,221 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-11-18 18:30:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:14,221 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-18 18:30:14,222 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) [2022-11-18 18:30:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-18 18:30:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:30:14,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:14,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:14,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:30:14,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:14,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-11-18 18:30:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:14,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671588965] [2022-11-18 18:30:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:14,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:14,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671588965] [2022-11-18 18:30:14,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671588965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:14,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:14,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:30:14,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165951870] [2022-11-18 18:30:14,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:14,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:30:14,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:14,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:30:14,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:14,316 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:14,345 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-11-18 18:30:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:30:14,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:30:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:14,349 INFO L225 Difference]: With dead ends: 35 [2022-11-18 18:30:14,349 INFO L226 Difference]: Without dead ends: 35 [2022-11-18 18:30:14,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:14,354 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:14,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:30:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-18 18:30:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-18 18:30:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-18 18:30:14,369 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2022-11-18 18:30:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:14,369 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-18 18:30:14,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-18 18:30:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:30:14,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:14,374 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:14,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:30:14,375 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-11-18 18:30:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:14,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079506780] [2022-11-18 18:30:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:14,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:14,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079506780] [2022-11-18 18:30:14,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079506780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:14,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283377971] [2022-11-18 18:30:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:14,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:14,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:14,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:14,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:30:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:14,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:30:14,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:14,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:14,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283377971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:14,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:14,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-18 18:30:14,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032073071] [2022-11-18 18:30:14,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:14,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:30:14,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:14,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:30:14,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:30:14,665 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:14,759 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2022-11-18 18:30:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:30:14,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 18:30:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:14,761 INFO L225 Difference]: With dead ends: 109 [2022-11-18 18:30:14,761 INFO L226 Difference]: Without dead ends: 109 [2022-11-18 18:30:14,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:30:14,762 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 128 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:14,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 125 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:30:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-18 18:30:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 47. [2022-11-18 18:30:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.375) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-18 18:30:14,768 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 10 [2022-11-18 18:30:14,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:14,769 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-18 18:30:14,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:14,769 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-18 18:30:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:30:14,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:14,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:14,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:14,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:30:14,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-11-18 18:30:14,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:14,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57485209] [2022-11-18 18:30:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:14,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:15,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:15,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57485209] [2022-11-18 18:30:15,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57485209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:15,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952881531] [2022-11-18 18:30:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:15,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:15,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:15,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:15,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:30:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:30:15,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:15,263 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:30:15,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:30:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:15,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:15,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952881531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:15,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:15,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-18 18:30:15,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058446062] [2022-11-18 18:30:15,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:15,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:30:15,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:30:15,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:30:15,462 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:15,704 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2022-11-18 18:30:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:30:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:30:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:15,706 INFO L225 Difference]: With dead ends: 108 [2022-11-18 18:30:15,706 INFO L226 Difference]: Without dead ends: 108 [2022-11-18 18:30:15,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:30:15,708 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 213 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:15,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 76 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:30:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-18 18:30:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 48. [2022-11-18 18:30:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-18 18:30:15,714 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 11 [2022-11-18 18:30:15,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:15,714 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-18 18:30:15,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-18 18:30:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:30:15,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:15,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:15,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:15,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:15,922 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-11-18 18:30:15,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:15,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870238793] [2022-11-18 18:30:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:15,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:15,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:15,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870238793] [2022-11-18 18:30:15,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870238793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:15,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405063907] [2022-11-18 18:30:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:15,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:15,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:15,982 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:16,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:30:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:16,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:30:16,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:16,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:16,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405063907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:16,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:16,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-18 18:30:16,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324447189] [2022-11-18 18:30:16,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:30:16,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:16,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:30:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:30:16,149 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:16,197 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-11-18 18:30:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:30:16,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:30:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:16,198 INFO L225 Difference]: With dead ends: 48 [2022-11-18 18:30:16,198 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 18:30:16,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:30:16,202 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:16,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 87 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:30:16,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 18:30:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-18 18:30:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-11-18 18:30:16,213 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 12 [2022-11-18 18:30:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:16,213 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-11-18 18:30:16,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-11-18 18:30:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 18:30:16,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:16,215 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 18:30:16,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:16,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 18:30:16,422 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-11-18 18:30:16,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:16,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183581239] [2022-11-18 18:30:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:16,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:16,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183581239] [2022-11-18 18:30:16,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183581239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965797855] [2022-11-18 18:30:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:30:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:16,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:16,591 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:16,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:30:16,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:30:16,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:16,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:30:16,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:16,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:16,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965797855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:16,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:16,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 18:30:16,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038000463] [2022-11-18 18:30:16,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:16,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:30:16,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:16,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:30:16,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:30:16,952 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:17,462 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2022-11-18 18:30:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:30:17,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-18 18:30:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:17,464 INFO L225 Difference]: With dead ends: 202 [2022-11-18 18:30:17,464 INFO L226 Difference]: Without dead ends: 202 [2022-11-18 18:30:17,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:30:17,465 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 463 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:17,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 243 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:30:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-18 18:30:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 77. [2022-11-18 18:30:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.3) internal successors, (91), 76 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2022-11-18 18:30:17,471 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 25 [2022-11-18 18:30:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:17,471 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2022-11-18 18:30:17,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2022-11-18 18:30:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 18:30:17,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:17,473 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 18:30:17,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:17,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:17,679 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1794938034, now seen corresponding path program 2 times [2022-11-18 18:30:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:17,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469998788] [2022-11-18 18:30:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:17,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:17,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:17,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469998788] [2022-11-18 18:30:17,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469998788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:17,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341322789] [2022-11-18 18:30:17,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:30:17,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:17,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:17,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:17,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:30:18,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:30:18,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 18:30:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:18,078 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:30:18,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:30:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:18,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:18,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341322789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:18,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:18,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-18 18:30:18,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628497377] [2022-11-18 18:30:18,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:18,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:30:18,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:30:18,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:30:18,686 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 20 states, 19 states have (on average 4.0) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:19,460 INFO L93 Difference]: Finished difference Result 198 states and 219 transitions. [2022-11-18 18:30:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:30:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.0) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 18:30:19,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:19,462 INFO L225 Difference]: With dead ends: 198 [2022-11-18 18:30:19,462 INFO L226 Difference]: Without dead ends: 198 [2022-11-18 18:30:19,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=328, Invalid=794, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:30:19,463 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 946 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:19,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 179 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:30:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-18 18:30:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 78. [2022-11-18 18:30:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 77 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2022-11-18 18:30:19,468 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 26 [2022-11-18 18:30:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:19,469 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2022-11-18 18:30:19,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.0) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2022-11-18 18:30:19,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:30:19,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:19,470 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:19,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:19,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:19,671 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash 191446135, now seen corresponding path program 2 times [2022-11-18 18:30:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:19,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381489961] [2022-11-18 18:30:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:19,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:19,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:19,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381489961] [2022-11-18 18:30:19,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381489961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:19,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802275901] [2022-11-18 18:30:19,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:30:19,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:19,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:19,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:19,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:30:19,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:30:19,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:19,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 18:30:19,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:19,916 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 18:30:19,916 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 11 [2022-11-18 18:30:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 18:30:19,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:30:19,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802275901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:19,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:30:19,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-18 18:30:19,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310543683] [2022-11-18 18:30:19,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:19,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:30:19,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:30:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:30:19,994 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:20,007 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-11-18 18:30:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:30:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 18:30:20,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:20,008 INFO L225 Difference]: With dead ends: 76 [2022-11-18 18:30:20,008 INFO L226 Difference]: Without dead ends: 76 [2022-11-18 18:30:20,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:30:20,009 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:20,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:30:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-18 18:30:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-18 18:30:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2022-11-18 18:30:20,014 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 27 [2022-11-18 18:30:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:20,014 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2022-11-18 18:30:20,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2022-11-18 18:30:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:30:20,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:20,015 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:20,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:20,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:30:20,221 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 191446136, now seen corresponding path program 1 times [2022-11-18 18:30:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:20,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594070311] [2022-11-18 18:30:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:20,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:20,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594070311] [2022-11-18 18:30:20,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594070311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:20,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453326813] [2022-11-18 18:30:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:20,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:20,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:20,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:20,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:30:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:30:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:20,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:20,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453326813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:20,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:20,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-18 18:30:20,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570670338] [2022-11-18 18:30:20,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:20,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:30:20,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:30:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:30:20,781 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:20,887 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2022-11-18 18:30:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:30:20,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 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 27 [2022-11-18 18:30:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:20,889 INFO L225 Difference]: With dead ends: 76 [2022-11-18 18:30:20,889 INFO L226 Difference]: Without dead ends: 76 [2022-11-18 18:30:20,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:30:20,890 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:20,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 136 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:30:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-18 18:30:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-18 18:30:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-11-18 18:30:20,893 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 27 [2022-11-18 18:30:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:20,894 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-11-18 18:30:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-11-18 18:30:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 18:30:20,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:20,896 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1] [2022-11-18 18:30:20,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:21,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 18:30:21,102 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:21,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1250891000, now seen corresponding path program 3 times [2022-11-18 18:30:21,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:21,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795728256] [2022-11-18 18:30:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:21,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:21,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:21,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795728256] [2022-11-18 18:30:21,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795728256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:21,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935949114] [2022-11-18 18:30:21,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:30:21,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:21,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:21,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:21,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:30:21,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:30:21,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:21,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:30:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-18 18:30:21,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-18 18:30:22,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935949114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:22,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:22,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 22 [2022-11-18 18:30:22,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092129516] [2022-11-18 18:30:22,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:22,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:30:22,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:30:22,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:30:22,268 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 23 states, 22 states have (on average 3.590909090909091) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:22,997 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2022-11-18 18:30:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:30:22,997 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.590909090909091) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-18 18:30:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:22,998 INFO L225 Difference]: With dead ends: 120 [2022-11-18 18:30:22,998 INFO L226 Difference]: Without dead ends: 120 [2022-11-18 18:30:22,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=362, Invalid=1120, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 18:30:23,000 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 488 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:23,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 260 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:30:23,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-18 18:30:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2022-11-18 18:30:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-18 18:30:23,004 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 55 [2022-11-18 18:30:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:23,004 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-18 18:30:23,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.590909090909091) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-18 18:30:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 18:30:23,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:23,006 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1] [2022-11-18 18:30:23,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:23,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:23,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:23,211 INFO L85 PathProgramCache]: Analyzing trace with hash -122915282, now seen corresponding path program 3 times [2022-11-18 18:30:23,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:23,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368287444] [2022-11-18 18:30:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:23,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:23,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368287444] [2022-11-18 18:30:23,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368287444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651356484] [2022-11-18 18:30:23,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:30:23,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:23,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:23,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:23,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:30:23,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:30:23,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:23,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 18:30:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:23,846 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:30:23,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:30:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-18 18:30:24,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-18 18:30:24,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651356484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:24,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:24,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 23 [2022-11-18 18:30:24,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955932594] [2022-11-18 18:30:24,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:24,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:30:24,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:24,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:30:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:30:24,780 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 24 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:26,276 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2022-11-18 18:30:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 18:30:26,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-18 18:30:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:26,278 INFO L225 Difference]: With dead ends: 118 [2022-11-18 18:30:26,278 INFO L226 Difference]: Without dead ends: 118 [2022-11-18 18:30:26,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=491, Invalid=1861, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 18:30:26,280 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 820 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:26,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 165 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:30:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-18 18:30:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 72. [2022-11-18 18:30:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-11-18 18:30:26,283 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 56 [2022-11-18 18:30:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:26,293 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-11-18 18:30:26,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-11-18 18:30:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 18:30:26,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:26,295 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:26,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:30:26,496 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash 484543896, now seen corresponding path program 2 times [2022-11-18 18:30:26,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:26,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559428964] [2022-11-18 18:30:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:26,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:26,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:26,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559428964] [2022-11-18 18:30:26,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559428964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:26,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461914252] [2022-11-18 18:30:26,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:30:26,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:26,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:26,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:26,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:30:26,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:30:26,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:26,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:30:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:26,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:30:26,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-18 18:30:26,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:30:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-18 18:30:27,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:30:27,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461914252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:27,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:30:27,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 14 [2022-11-18 18:30:27,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743950526] [2022-11-18 18:30:27,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:27,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:30:27,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:27,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:30:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:30:27,224 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:27,245 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2022-11-18 18:30:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:30:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-18 18:30:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:27,247 INFO L225 Difference]: With dead ends: 128 [2022-11-18 18:30:27,247 INFO L226 Difference]: Without dead ends: 128 [2022-11-18 18:30:27,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:30:27,248 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 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 [2022-11-18 18:30:27,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:30:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-18 18:30:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-11-18 18:30:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 123 states have (on average 1.056910569105691) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-11-18 18:30:27,252 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 57 [2022-11-18 18:30:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:27,253 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-11-18 18:30:27,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-11-18 18:30:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 18:30:27,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:27,254 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:27,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:27,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:30:27,460 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1026867069, now seen corresponding path program 1 times [2022-11-18 18:30:27,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:27,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486960991] [2022-11-18 18:30:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:27,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-18 18:30:27,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486960991] [2022-11-18 18:30:27,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486960991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:27,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210527892] [2022-11-18 18:30:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:27,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:27,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:27,641 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:27,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:30:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:30:27,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:28,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210527892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:28,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:28,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 13, 13] total 27 [2022-11-18 18:30:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138165252] [2022-11-18 18:30:28,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:28,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 18:30:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 18:30:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:30:28,363 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:29,793 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2022-11-18 18:30:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 18:30:29,793 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-18 18:30:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:29,794 INFO L225 Difference]: With dead ends: 252 [2022-11-18 18:30:29,795 INFO L226 Difference]: Without dead ends: 252 [2022-11-18 18:30:29,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1681, Invalid=3289, Unknown=0, NotChecked=0, Total=4970 [2022-11-18 18:30:29,797 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 637 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:29,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 32 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:30:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-18 18:30:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2022-11-18 18:30:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 244 states have (on average 1.028688524590164) internal successors, (251), 246 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2022-11-18 18:30:29,804 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 63 [2022-11-18 18:30:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:29,804 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2022-11-18 18:30:29,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2022-11-18 18:30:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-18 18:30:29,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:29,807 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:29,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:30,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:30,016 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:30,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1510297113, now seen corresponding path program 1 times [2022-11-18 18:30:30,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:30,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117279870] [2022-11-18 18:30:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:30,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:30,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:30,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117279870] [2022-11-18 18:30:30,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117279870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:30,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18567139] [2022-11-18 18:30:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:30,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:30,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:30,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:31,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:30:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 18:30:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:32,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:33,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18567139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:33,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:33,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2022-11-18 18:30:33,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915818846] [2022-11-18 18:30:33,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:33,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-18 18:30:33,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-18 18:30:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2022-11-18 18:30:33,822 INFO L87 Difference]: Start difference. First operand 247 states and 251 transitions. Second operand has 71 states, 71 states have (on average 4.929577464788732) internal successors, (350), 71 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:34,175 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2022-11-18 18:30:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 18:30:34,176 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.929577464788732) internal successors, (350), 71 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2022-11-18 18:30:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:34,178 INFO L225 Difference]: With dead ends: 347 [2022-11-18 18:30:34,178 INFO L226 Difference]: Without dead ends: 347 [2022-11-18 18:30:34,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2022-11-18 18:30:34,180 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 312 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:34,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 98 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:30:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-18 18:30:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2022-11-18 18:30:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 344 states have (on average 1.0203488372093024) internal successors, (351), 346 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 351 transitions. [2022-11-18 18:30:34,189 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 351 transitions. Word has length 126 [2022-11-18 18:30:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:34,191 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 351 transitions. [2022-11-18 18:30:34,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.929577464788732) internal successors, (350), 71 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 351 transitions. [2022-11-18 18:30:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-18 18:30:34,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:34,196 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:34,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:34,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 18:30:34,406 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:34,407 INFO L85 PathProgramCache]: Analyzing trace with hash -79033337, now seen corresponding path program 2 times [2022-11-18 18:30:34,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:34,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549716902] [2022-11-18 18:30:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:34,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2022-11-18 18:30:34,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:34,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549716902] [2022-11-18 18:30:34,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549716902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:34,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148023595] [2022-11-18 18:30:34,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:30:34,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:34,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:34,669 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:34,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:30:34,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:30:34,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:34,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:30:34,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:36,138 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_17| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_12| Int) (v_ArrVal_415 Int) (v_ArrVal_414 Int) (v_ArrVal_413 Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_17| v_ArrVal_414) |v_ULTIMATE.start_main_~#mask~0#1.base_12| v_ArrVal_413) |v_ULTIMATE.start_main_~#b~0#1.base_17| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_12| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_17|) 0) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_17| v_ArrVal_415) |v_ULTIMATE.start_main_~#mask~0#1.base_12|) 0))) is different from true [2022-11-18 18:30:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2513 trivial. 0 not checked. [2022-11-18 18:30:36,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:30:36,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148023595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:36,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:30:36,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-18 18:30:36,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891324776] [2022-11-18 18:30:36,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:36,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:30:36,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:36,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:30:36,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-18 18:30:36,152 INFO L87 Difference]: Start difference. First operand 347 states and 351 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:36,155 INFO L93 Difference]: Finished difference Result 348 states and 351 transitions. [2022-11-18 18:30:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:30:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2022-11-18 18:30:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:36,157 INFO L225 Difference]: With dead ends: 348 [2022-11-18 18:30:36,157 INFO L226 Difference]: Without dead ends: 346 [2022-11-18 18:30:36,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-18 18:30:36,158 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:36,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-11-18 18:30:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-18 18:30:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-11-18 18:30:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 343 states have (on average 1.0174927113702623) internal successors, (349), 345 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 349 transitions. [2022-11-18 18:30:36,165 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 349 transitions. Word has length 176 [2022-11-18 18:30:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:36,166 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 349 transitions. [2022-11-18 18:30:36,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 349 transitions. [2022-11-18 18:30:36,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-18 18:30:36,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:36,169 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:36,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:36,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:30:36,374 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:36,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1845056352, now seen corresponding path program 1 times [2022-11-18 18:30:36,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:36,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173611001] [2022-11-18 18:30:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:36,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2514 trivial. 0 not checked. [2022-11-18 18:30:36,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:36,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173611001] [2022-11-18 18:30:36,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173611001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:36,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330108045] [2022-11-18 18:30:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:36,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:36,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:36,664 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:36,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:30:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:30:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 2297 trivial. 0 not checked. [2022-11-18 18:30:37,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 215 proven. 3 refuted. 0 times theorem prover too weak. 2297 trivial. 0 not checked. [2022-11-18 18:30:37,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330108045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:37,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:37,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2022-11-18 18:30:37,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522649572] [2022-11-18 18:30:37,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:37,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:30:37,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:37,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:30:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:30:37,517 INFO L87 Difference]: Start difference. First operand 346 states and 349 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:37,689 INFO L93 Difference]: Finished difference Result 698 states and 703 transitions. [2022-11-18 18:30:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:30:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-11-18 18:30:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:37,692 INFO L225 Difference]: With dead ends: 698 [2022-11-18 18:30:37,692 INFO L226 Difference]: Without dead ends: 698 [2022-11-18 18:30:37,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:30:37,692 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:37,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 87 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:30:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-18 18:30:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2022-11-18 18:30:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 691 states have (on average 1.0173661360347324) internal successors, (703), 693 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 703 transitions. [2022-11-18 18:30:37,705 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 703 transitions. Word has length 177 [2022-11-18 18:30:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:37,706 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 703 transitions. [2022-11-18 18:30:37,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 703 transitions. [2022-11-18 18:30:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-18 18:30:37,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:37,711 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:37,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:37,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:37,918 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:37,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:37,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1138865693, now seen corresponding path program 1 times [2022-11-18 18:30:37,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:37,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270944617] [2022-11-18 18:30:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:37,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2022-11-18 18:30:39,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:39,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270944617] [2022-11-18 18:30:39,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270944617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:39,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258866776] [2022-11-18 18:30:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:39,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:39,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:39,098 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:39,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:30:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:39,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 18:30:39,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:39,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:30:39,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-18 18:30:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2022-11-18 18:30:41,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2022-11-18 18:30:43,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258866776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:43,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:43,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2022-11-18 18:30:43,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990807914] [2022-11-18 18:30:43,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:43,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:30:43,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:30:43,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:30:43,186 INFO L87 Difference]: Start difference. First operand 694 states and 703 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:43,289 INFO L93 Difference]: Finished difference Result 858 states and 866 transitions. [2022-11-18 18:30:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:30:43,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2022-11-18 18:30:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:43,293 INFO L225 Difference]: With dead ends: 858 [2022-11-18 18:30:43,293 INFO L226 Difference]: Without dead ends: 858 [2022-11-18 18:30:43,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:30:43,297 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:43,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 80 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:30:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-11-18 18:30:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2022-11-18 18:30:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 855 states have (on average 1.0128654970760234) internal successors, (866), 857 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 866 transitions. [2022-11-18 18:30:43,319 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 866 transitions. Word has length 334 [2022-11-18 18:30:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:43,320 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 866 transitions. [2022-11-18 18:30:43,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 866 transitions. [2022-11-18 18:30:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2022-11-18 18:30:43,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:43,341 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 128, 128, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:43,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:43,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:43,548 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:43,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1652938709, now seen corresponding path program 2 times [2022-11-18 18:30:43,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:43,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830312031] [2022-11-18 18:30:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:43,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 0 proven. 31150 refuted. 0 times theorem prover too weak. 10050 trivial. 0 not checked. [2022-11-18 18:30:44,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:44,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830312031] [2022-11-18 18:30:44,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830312031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265854151] [2022-11-18 18:30:44,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:30:44,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:44,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:44,784 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:44,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:30:45,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:30:45,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:45,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:30:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 5189 proven. 20766 refuted. 0 times theorem prover too weak. 15245 trivial. 0 not checked. [2022-11-18 18:30:48,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:49,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-18 18:30:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 5189 proven. 20766 refuted. 0 times theorem prover too weak. 15245 trivial. 0 not checked. [2022-11-18 18:30:50,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265854151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:50,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:50,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-11-18 18:30:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841167213] [2022-11-18 18:30:50,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:50,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:30:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:30:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:30:50,915 INFO L87 Difference]: Start difference. First operand 858 states and 866 transitions. Second operand has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:51,286 INFO L93 Difference]: Finished difference Result 1038 states and 1045 transitions. [2022-11-18 18:30:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:30:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 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 678 [2022-11-18 18:30:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:51,291 INFO L225 Difference]: With dead ends: 1038 [2022-11-18 18:30:51,291 INFO L226 Difference]: Without dead ends: 1038 [2022-11-18 18:30:51,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1369 GetRequests, 1346 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-11-18 18:30:51,292 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 196 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:51,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 259 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:30:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-18 18:30:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 865. [2022-11-18 18:30:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 862 states have (on average 1.0127610208816706) internal successors, (873), 864 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 873 transitions. [2022-11-18 18:30:51,314 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 873 transitions. Word has length 678 [2022-11-18 18:30:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:51,316 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 873 transitions. [2022-11-18 18:30:51,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 873 transitions. [2022-11-18 18:30:51,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2022-11-18 18:30:51,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:51,344 INFO L195 NwaCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-11-18 18:30:51,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:51,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:51,552 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:30:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:51,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1289503496, now seen corresponding path program 2 times [2022-11-18 18:30:51,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:51,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112439277] [2022-11-18 18:30:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:51,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2022-11-18 18:30:54,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:54,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112439277] [2022-11-18 18:30:54,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112439277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:54,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894876011] [2022-11-18 18:30:54,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:30:54,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:54,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:54,903 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:54,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:30:55,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:30:55,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:55,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 2291 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 18:30:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:55,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:30:55,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-18 18:31:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2022-11-18 18:31:01,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2022-11-18 18:31:05,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894876011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:05,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:05,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2022-11-18 18:31:05,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594191713] [2022-11-18 18:31:05,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:05,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:31:05,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:05,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:31:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:31:05,823 INFO L87 Difference]: Start difference. First operand 865 states and 873 transitions. Second operand has 18 states, 17 states have (on average 10.470588235294118) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:31:06,267 INFO L93 Difference]: Finished difference Result 2238 states and 2264 transitions. [2022-11-18 18:31:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:31:06,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 10.470588235294118) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 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 835 [2022-11-18 18:31:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:31:06,278 INFO L225 Difference]: With dead ends: 2238 [2022-11-18 18:31:06,278 INFO L226 Difference]: Without dead ends: 2238 [2022-11-18 18:31:06,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1680 GetRequests, 1659 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:31:06,279 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 158 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:31:06,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 410 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:31:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2022-11-18 18:31:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2229. [2022-11-18 18:31:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2226 states have (on average 1.013027852650494) internal successors, (2255), 2228 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2255 transitions. [2022-11-18 18:31:06,319 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2255 transitions. Word has length 835 [2022-11-18 18:31:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:31:06,320 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 2255 transitions. [2022-11-18 18:31:06,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 10.470588235294118) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2255 transitions. [2022-11-18 18:31:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2022-11-18 18:31:06,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:31:06,329 INFO L195 NwaCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:06,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:06,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:06,540 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:31:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 77125929, now seen corresponding path program 1 times [2022-11-18 18:31:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956957883] [2022-11-18 18:31:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 51915 refuted. 0 times theorem prover too weak. 12605 trivial. 0 not checked. [2022-11-18 18:31:08,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:08,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956957883] [2022-11-18 18:31:08,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956957883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:08,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044418677] [2022-11-18 18:31:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:08,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:08,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:08,120 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:08,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:31:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 2368 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-18 18:31:08,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 54372 refuted. 0 times theorem prover too weak. 10148 trivial. 0 not checked. [2022-11-18 18:31:11,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 723 proven. 51975 refuted. 0 times theorem prover too weak. 11822 trivial. 0 not checked. [2022-11-18 18:31:13,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044418677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:13,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:13,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 35, 14] total 48 [2022-11-18 18:31:13,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318113167] [2022-11-18 18:31:13,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:13,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 18:31:13,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:13,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 18:31:13,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=1689, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 18:31:13,900 INFO L87 Difference]: Start difference. First operand 2229 states and 2255 transitions. Second operand has 48 states, 48 states have (on average 6.208333333333333) internal successors, (298), 48 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:31:17,461 INFO L93 Difference]: Finished difference Result 2235 states and 2249 transitions. [2022-11-18 18:31:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 18:31:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.208333333333333) internal successors, (298), 48 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 862 [2022-11-18 18:31:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:31:17,469 INFO L225 Difference]: With dead ends: 2235 [2022-11-18 18:31:17,470 INFO L226 Difference]: Without dead ends: 2235 [2022-11-18 18:31:17,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1735 GetRequests, 1683 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=783, Invalid=1973, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 18:31:17,471 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 564 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 6115 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 6221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 6115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:31:17,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 780 Invalid, 6221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 6115 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-18 18:31:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-11-18 18:31:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2226. [2022-11-18 18:31:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2223 states have (on average 1.0116959064327486) internal successors, (2249), 2225 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 2249 transitions. [2022-11-18 18:31:17,537 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 2249 transitions. Word has length 862 [2022-11-18 18:31:17,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:31:17,538 INFO L495 AbstractCegarLoop]: Abstraction has 2226 states and 2249 transitions. [2022-11-18 18:31:17,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.208333333333333) internal successors, (298), 48 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 2249 transitions. [2022-11-18 18:31:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2019 [2022-11-18 18:31:17,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:31:17,570 INFO L195 NwaCegarLoop]: trace histogram [384, 384, 384, 384, 384, 12, 12, 12, 12, 12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-18 18:31:17,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:17,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 18:31:17,780 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:31:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:17,781 INFO L85 PathProgramCache]: Analyzing trace with hash -546829714, now seen corresponding path program 3 times [2022-11-18 18:31:17,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:17,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311225925] [2022-11-18 18:31:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:17,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 372770 backedges. 0 proven. 342618 refuted. 0 times theorem prover too weak. 30152 trivial. 0 not checked. [2022-11-18 18:31:25,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:25,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311225925] [2022-11-18 18:31:25,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311225925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:25,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041432852] [2022-11-18 18:31:25,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:31:25,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:25,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:25,210 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:25,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:31:25,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:31:25,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:31:25,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 18:31:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:31:25,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-18 18:31:25,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:31:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 372770 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 372764 trivial. 0 not checked. [2022-11-18 18:31:33,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:31:33,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041432852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:33,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:31:33,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2022-11-18 18:31:33,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80795077] [2022-11-18 18:31:33,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:33,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:31:33,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:33,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:31:33,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:31:33,978 INFO L87 Difference]: Start difference. First operand 2226 states and 2249 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:31:34,072 INFO L93 Difference]: Finished difference Result 2224 states and 2238 transitions. [2022-11-18 18:31:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:31:34,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2018 [2022-11-18 18:31:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:31:34,082 INFO L225 Difference]: With dead ends: 2224 [2022-11-18 18:31:34,082 INFO L226 Difference]: Without dead ends: 2224 [2022-11-18 18:31:34,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2033 GetRequests, 2015 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:31:34,084 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:31:34,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 46 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:31:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2022-11-18 18:31:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2060. [2022-11-18 18:31:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 1.006799417192812) internal successors, (2073), 2059 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2073 transitions. [2022-11-18 18:31:34,122 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2073 transitions. Word has length 2018 [2022-11-18 18:31:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:31:34,125 INFO L495 AbstractCegarLoop]: Abstraction has 2060 states and 2073 transitions. [2022-11-18 18:31:34,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:34,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2073 transitions. [2022-11-18 18:31:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2060 [2022-11-18 18:31:34,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:31:34,195 INFO L195 NwaCegarLoop]: trace histogram [384, 384, 384, 384, 384, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:34,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-18 18:31:34,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:34,401 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:31:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2041682871, now seen corresponding path program 2 times [2022-11-18 18:31:34,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:34,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179391617] [2022-11-18 18:31:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:34,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 373038 backedges. 0 proven. 342618 refuted. 0 times theorem prover too weak. 30420 trivial. 0 not checked. [2022-11-18 18:31:40,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:40,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179391617] [2022-11-18 18:31:40,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179391617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:40,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599134444] [2022-11-18 18:31:40,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:31:40,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:40,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:40,733 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:40,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 18:31:41,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:31:41,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:31:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:31:41,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:01,655 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_23| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_18| Int) (v_ArrVal_3289 Int) (v_ArrVal_3287 Int) (v_ArrVal_3288 Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_23| v_ArrVal_3289) |v_ULTIMATE.start_main_~#mask~0#1.base_18| v_ArrVal_3288) |v_ULTIMATE.start_main_~#b~0#1.base_23| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_18| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_23| v_ArrVal_3287) |v_ULTIMATE.start_main_~#mask~0#1.base_18|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_23|) 0))) is different from true [2022-11-18 18:32:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 373038 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373038 trivial. 0 not checked. [2022-11-18 18:32:01,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:32:01,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599134444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:01,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:32:01,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 17 [2022-11-18 18:32:01,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159025625] [2022-11-18 18:32:01,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:01,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:32:01,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:32:01,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2022-11-18 18:32:01,698 INFO L87 Difference]: Start difference. First operand 2060 states and 2073 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:01,704 INFO L93 Difference]: Finished difference Result 2059 states and 2072 transitions. [2022-11-18 18:32:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:32:01,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2059 [2022-11-18 18:32:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:01,706 INFO L225 Difference]: With dead ends: 2059 [2022-11-18 18:32:01,707 INFO L226 Difference]: Without dead ends: 0 [2022-11-18 18:32:01,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 2058 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2022-11-18 18:32:01,707 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:01,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-11-18 18:32:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-18 18:32:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-18 18:32:01,709 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) [2022-11-18 18:32:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-18 18:32:01,709 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2059 [2022-11-18 18:32:01,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:01,709 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 18:32:01,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:01,710 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-18 18:32:01,710 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-18 18:32:01,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2022-11-18 18:32:01,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2022-11-18 18:32:01,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-11-18 18:32:01,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-11-18 18:32:01,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-11-18 18:32:01,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2022-11-18 18:32:01,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2022-11-18 18:32:01,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-11-18 18:32:01,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 18:32:01,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 18:32:01,923 INFO L444 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:01,925 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 18:32:01,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 06:32:01 BoogieIcfgContainer [2022-11-18 18:32:01,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 18:32:01,929 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 18:32:01,929 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 18:32:01,929 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 18:32:01,930 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:30:12" (3/4) ... [2022-11-18 18:32:01,933 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-18 18:32:01,945 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-18 18:32:01,945 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-18 18:32:01,945 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-18 18:32:01,946 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-18 18:32:01,982 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/witness.graphml [2022-11-18 18:32:01,982 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 18:32:01,982 INFO L158 Benchmark]: Toolchain (without parser) took 109977.48ms. Allocated memory was 107.0MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 73.3MB in the beginning and 963.9MB in the end (delta: -890.6MB). Peak memory consumption was 975.0MB. Max. memory is 16.1GB. [2022-11-18 18:32:01,983 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:32:01,983 INFO L158 Benchmark]: CACSL2BoogieTranslator took 311.32ms. Allocated memory is still 107.0MB. Free memory was 73.1MB in the beginning and 82.4MB in the end (delta: -9.3MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2022-11-18 18:32:01,983 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.84ms. Allocated memory is still 107.0MB. Free memory was 82.4MB in the beginning and 80.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:32:01,984 INFO L158 Benchmark]: Boogie Preprocessor took 24.77ms. Allocated memory is still 107.0MB. Free memory was 80.6MB in the beginning and 79.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:32:01,984 INFO L158 Benchmark]: RCFGBuilder took 367.09ms. Allocated memory is still 107.0MB. Free memory was 79.2MB in the beginning and 67.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 18:32:01,984 INFO L158 Benchmark]: TraceAbstraction took 109176.59ms. Allocated memory was 107.0MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 67.0MB in the beginning and 966.0MB in the end (delta: -899.0MB). Peak memory consumption was 967.4MB. Max. memory is 16.1GB. [2022-11-18 18:32:01,985 INFO L158 Benchmark]: Witness Printer took 52.87ms. Allocated memory is still 2.0GB. Free memory was 966.0MB in the beginning and 963.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:32:01,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 311.32ms. Allocated memory is still 107.0MB. Free memory was 73.1MB in the beginning and 82.4MB in the end (delta: -9.3MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.84ms. Allocated memory is still 107.0MB. Free memory was 82.4MB in the beginning and 80.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.77ms. Allocated memory is still 107.0MB. Free memory was 80.6MB in the beginning and 79.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 367.09ms. Allocated memory is still 107.0MB. Free memory was 79.2MB in the beginning and 67.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 109176.59ms. Allocated memory was 107.0MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 67.0MB in the beginning and 966.0MB in the end (delta: -899.0MB). Peak memory consumption was 967.4MB. Max. memory is 16.1GB. * Witness Printer took 52.87ms. Allocated memory is still 2.0GB. Free memory was 966.0MB in the beginning and 963.9MB 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: 16]: array index is always in bounds For all program executions holds that array index is always in bounds 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: 21]: 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, 31 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 109.1s, OverallIterations: 25, TraceHistogramMax: 384, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.2s, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5360 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5360 mSDsluCounter, 3367 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 52 IncrementalHoareTripleChecker+Unchecked, 2739 mSDsCounter, 414 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9621 IncrementalHoareTripleChecker+Invalid, 10087 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 414 mSolverCounterUnsat, 628 mSDtfsCounter, 9621 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11213 GetRequests, 10724 SyntacticMatches, 3 SemanticMatches, 486 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 10.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2229occurred in iteration=22, InterpolantAutomatonStates: 318, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 897 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 84.9s InterpolantComputationTime, 15298 NumberOfCodeBlocks, 10918 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 18535 ConstructedInterpolants, 2231 QuantifiedInterpolants, 204929 SizeOfPredicates, 70 NumberOfNonLiveVariables, 9556 ConjunctsInSsa, 348 ConjunctsInUnsatCore, 60 InterpolantComputations, 10 PerfectInterpolantSequences, 959061/2052012 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 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-18 18:32:02,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc98494-132a-4bc0-a7dc-a553b14fac2b/bin/uautomizer-TMbwUNV5ro/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